Ac delco spark plug heat range chart

ACDELCO CR43TS Specifications. ACDelco Standard Spark Plugs are precisely engineered and manufactured to provide everyday reliability and efficient performance. A copper-core center electrode that helps provide improved heat transfer to the tip, giving you the reliability you're looking for while improving its resistance to low-speed carbon ...

Ac delco spark plug heat range chart. ACDelco's RAPIDFIRE Performance Platinum Spark Plugs offer longer life and improved efficiency over time as compared to conventional spark plugs. Available for most vehicle makes and models, and several marine applications, the RAPIDFIRE Platinum Spark Plug design features: Ribless insulator that may improve the plug-to-boot seal.

Spark plugs serve one of the most important functions on the automotive internal combustion engine. They receive a high-voltage, timed spark from the ignition coil, distribution sy...

A discussion thread about how to read the heat range of AC Delco spark plugs. Users share their experiences and opinions on different plug types and numbers, and how they affect engine performance.If in doubt simply get some older generation R44N or 44N non extended tip plugs from summit or ebay that are same basic heat range as the R44xls plugs you have been running. I still buy older gen AC Delco plugs like R44xls /r44ts/r45/r45ts/etc from summit so hopefully they will have the non extended 44N or R44N in stock too.Ac Delco Spark Plug Heat Range Chart. Ngk vs. ac delco spark plugs Spark plug delco mancave Spark plug reference cross ngk heat plugs range chart racing garage doors gif friday featured stuff car engine exactly alike. Ac delco spark plug application guide. Spark plug infoAc delco spark plug heat range chart Delco …Detailed Description. Spark Plug; ACDelco GM OE Iridium Spark Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These Iridium Spark Plugs are a high quality replacement for many vehicles on the road today. They are our latest in spark plug technology and an exact replacement for your vehicle's ...Advertisement You can understand a two-stroke engine by watching each part of the cycle. Start with the point where the spark plug fires. Fuel and air in the cylinder have been com...When it comes to maintaining the performance and efficiency of your vehicle’s engine, choosing the right spark plug is crucial. The heat range and gap of a spark plug play a signif...Buy ACDelco Gold Conventional Spark Plug - AC C87 online from NAPA Auto Parts Stores. ... ACDelco: Spark Plug Thread Size: 18 mm: Seat Type: Gasket: Electrode Core Material ... Spark Plug Seat Type: Flat: Spark Plug Hex Size: 13/16 in. Hex Size: 3/4 in: Spark Plug Heat Range: NGK7: Buyer's Guide. Safety Information. Vehicle Fitment …

ACDelco GM OE parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some ACDelco GM OE parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional. Black Onyx coating helps reduce corrosion. Copper core provides great heat transfer and helps maximize plug …Most spark plug manufacturers recommend that the tip temperature remain between 500-850 degrees Celsius. Diagram courtesy of NGK Spark Plugs. Heat … Thread Diameter (MM) 14. Weight (lb) 0.36. Width (IN) 3.84. GM Original Equipment; Conventional; Pre-Set Gap: 0.044". ACDelco Standard Spark Plugs are precisely engineered and manufactured to provide everyday reliability and efficient performance. Features & Benefits: Iridium allows for small, efficient electrode designs for reliable cold starting and quick acceleration. Iridium fine-wire electrode helps burn away carbon deposits on the tip of the plug as they form. See More. $9.49. each. In Stock. $13.10. Save $3.61.Plug reference cross spark chart range heat accel champion academia pdf eduChampion spark plug heat range chart Ac delco plug heat range chart991.2 spark plug options. Ac spark plug heat range chartDayton auto and memorabilia museum Ford motorcraft spark plug heat range chartSpark plug. Check Details. Champion heat …IF there's room for the AC Extended Tip plug, I'd use that one, in either 44 or 43 heat range. Several advantages ot the "S" plug. It puts the firing tip of the plug a little deeper into the combustion chamber for a better fuel burn, a few bits of a second quicker than a normal plug.

I went with Taylor Thundervolt 8.2mm wires, an upgrade from 7mm wires I removed. Does anyone know of a source I can find the heat range on the AC Delco plugs? I found a chart explaining the heat range differences and 16 seems to be the hottest to safely run in my engine, and Summit Racing references the Denso plugs are compatible to my engine.The range of thermal values for BRISK spark plugs extend from the warmest to the coldest, namely 19, 18, 17, 15, 14, 12, 10 and 08. "Hot" spark plugs remove heat from the combustion area relatively slowly. They have a longer insulator tip and they achieve a temperature higher than the deposition zone relatively fast.3 Year Limited Warranty. Seat: Tapered. Thread Size: M14. Hex Size (in): 5/8 Inch. Show More. O'Reilly Auto Parts carries products from ACDelco Rapidfire Platinum. Browse our selection of options to find the right products for your vehicle.The number 41 for these spark plugs means they belong to series “41” of AC Delco spark plug products. The next sets of numbers indicate the spark plugs’ heat range or the spark plug’s ability to transform heat from the tip to the engine’s cooling system.Plug acdelco spark iridium ac chart delco plugs 41 heat pro each gm amazon professional glow warranty read comparison additional. Cant find ac plug heat range chart....Ngk spark plug plugs codes read reference racing thread engine alfetta chart heat range code denso lexus sym honda malaysia Spark plugsAc delco spark …

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These RAPIDFIRE Single Platinum Performance Spark Plugs are designed for everyday use and are a high quality replacement for many vehicles on the road today. These premium aftermarket spark plugs have high-quality suppressors that help prevent misfiring, an improved plug to boot seal, and a pure copper core for greater durability. These premium ...Jan 14, 2007 ... AC-DELCO Spark Plug for a 1950 Oldsmobile ... AC R45S = Resistor by14mm by # 5 heat range by extended core nose. ... If you are really interested in ...Thread Size: 14mm · Heat Range: 14 · Hex Size:16mm · Preset Gap: 1mm · Insulator Height: 24.2mm.ACDelco's RAPIDFIRE Performance Platinum Spark Plugs offer longer life and improved efficiency over time as compared to conventional spark plugs. Available for most vehicle makes and models, and several marine applications, the RAPIDFIRE Platinum Spark Plug design features: Ribless insulator that may improve the plug-to-boot seal.ACDelco Copper Spark Plug 41-629 Shop All ACDelco. ACDelco9590. Part # 41-629. ... Manufacturer Heat Range: 4: Hex Size: 14 mm: Metal Type: Copper: Read Less. PRODUCT ...

Spark delco conventionalChampion autolite ngk accel chart plugs brisk iridium denso performance yttrium resistor groove oe w0133 dealer truckid n5 lgs savana Ac delco spark plugs heat range chartAc delco spark plug heat range chart. Ac delco plug chartDelco decoder blower pdf4pro Plug acdelco spark iridium ac chart delco plugs 41 …Motorcraft spark plug heat range chartBosch spark plugs cross reference chart Spark plug ac heat range plugs delco numbering system chart forum k10 equivalent modern rods hot forums corvetteforum replySpark plug heat chart range ngk look misfire sparkplug temp plugs issues operating blasterforum temperature f150online jun gif.Onan Spark Plugs: Both the 4K & 6K use the same heat range spark plug. Plug gap for both is .020” Cummins Onan spark plugs are part# 167-0262-99 <$7. The X-‐7525B service manual Section 24C page28 calls for the use of an AC Delco R46S spark plug. Possible spark plugs that cross for AC DELCO R46S:Spark Plug Heat Range Cross Reference. Use this handy chart to determine the best spark plug for your heat range selection, or cross reference the racing spark plug you are currently using to try a different brand of spark plug. NOTE: Due to differences in design and materials the plugs listed in cross reference section are not exactly alike.AC & Heater Components; Thermostats; Coolant & Coolant Additives; Oil & Fluid Coolers; ... ACDelco SPARK PLUG. Part Number: 065-R44LTS. Product Q&A View Now. Click image to zoom. $3.74 ... Copper Core Spark Plugs Ford EcoBoost 3.5L 14mm Thread 1.00" Reach Tapered Seat Projected Tip 5/8" Hex .030" Gap Heat Range: Stock 6/Pkg. View …GM Original Equipment™ Iridium Spark Plug - Part Number 41-114 (41114) by ACDelco. Available in Parts Department at www.carid.com ... Professional Conventional Spark Plugs ACDelco® - Car Maintenance Guide ACDelco® ... Spark Plug Seat Style: Conical: Heat Range: 16: Thread Diameter: 0.551" Resistance: 4-7.5 kOhm:Dec 21, 2019 · I went with Taylor Thundervolt 8.2mm wires, an upgrade from 7mm wires I removed. Does anyone know of a source I can find the heat range on the AC Delco plugs? I found a chart explaining the heat range differences and 16 seems to be the hottest to safely run in my engine, and Summit Racing references the Denso plugs are compatible to my engine. Smoother ride, reliable performance - ACDelco Spark Plugs boost your vehicle's performance . long-lasting performance, time and time again. Patented, one-piece insulator design - withstands temperature pressure and vibration. The copper core electrode - helps transfer heat, which is important for today's smaller hotter-running engines.

JEGS 412010 - 8.0mm Blue Pow'r Wires Small Block Chevy Over... (7) $29.15. JEGS 402010 - 8.0mm Black Pow'r Wires Small Block Chevy Ove... (9) $35.99. Some parts are not legal for use in California or other states with similar laws / regulations. Get the Best Performance with ACDelco SPARK PLUG R44LTS parts at JEGS.

Manufacturer Heat Range: 5: Pre-Gap Size (IN) ... Weight (lb) 0.36: Width (IN) 3.84: GM Original Equipment; Conventional; Pre-Set Gap: 0.044" ACDelco Standard Spark Plugs are precisely engineered and manufactured to provide everyday reliability and efficient performance. Features & Benefits: A copper-core center electrode that helps provide ...The spark plug heat range only indicates the rate that the spark plug dissipates its firing end heat to the engine. A hotter heat range spark plug has an insulator design with a …Feb 2, 2010 · The spark plug heat range has no relationship to the electrical energy transferred through the spark plug. The heat range of a spark plug is the range in which the plug works well thermally. The heat rating of NGK spark plugs is indicated by a number; lower numbers indicate a hotter type, higher numbers indicate a colder type. Watch this video to find out about the importance of using a kitchen range hood vented to the outside to remove heat, moisture, and pollutants from cooking. Expert Advice On Improv...These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form and function. Black Onyx coating helps reduce corrosion. Copper core provides great heat transfer and helps maximize plug durability. Ribbed suppressor seal extends resistance and helps prevent spark 'flash over' and misfires.ALL HOT ROD TALK AREA. Shop Talk. ac delco heat range chart. Welcome to Club Hot Rod! The premier site for everything to do with Hot Rod, Customs, Low Riders, Rat Rods, and more. » Members from all over the US and the world! » Help from all over the world for your questions. » Build logs for you and all members.ACDelco GM Original Equipment R45TS Conventional Spark Plug. USD 2.17. AC Delco R45TS Spark Plug Set of 8 for Chevy GMC Buick Cadillac Pontiac Olds. USD 27.44. Denso (5330) ITF16 Spark Plugs, Pack of 4. USD 29.08. Denso (5330) ITF16 Iridium Power Spark Plug, (Pack of 1) USD 8.12. Champion Copper Plus 18 Spark Plug RV15YC4.

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A discussion thread about how to read the heat range of AC Delco spark plugs. Users share their experiences and opinions on different plug types and …Carquest Premium. Semi Loaded Disc Brake Caliper with Bracket. $99.99. (46) Carquest Premium. Semi Loaded Disc Brake Caliper with Bracket. Feedback. Save on ACDelco Rapidfire Spark Plug 2 at Advance Auto Parts. Buy online, pick up in-store in 30 minutes.Take a look at the chart for the range of Champion offerings.Ac delco spark plug application guideHeat range plug chart ac spark cant find hotrodders forum hot reference size cross go Plugs spark chart champion plug heat range ngk autolite racing ac comparison engine bosch guide sparking table lodge alike shouldAc delco spark plugs for 4.3l.Most spark plug manufacturers recommend that the tip temperature remain between 500° C and 850° C. Heat ranges are designated by each spark plug …The ac delco spark plug decoder tableAc delco plug chart Pop trends deals product: acdelco ab14aa2 (14a-a2) lead-acidAc delco spark plugs heat range chart. Looking for colder ac delco plugsNgk iac control offshoreonly Catalogue (int spark plugs)Ac delco professional iridium spark plug.When it comes to maximizing engine performance, one crucial aspect that often gets overlooked is the spark plug gap. A spark plug gap chart is a valuable tool that helps determine ...GM Original Equipment™ Iridium Spark Plug - Part Number 41-114 (41114) by ACDelco. Available in Parts Department at www.carid.com ... Professional Conventional Spark Plugs ACDelco® - Car Maintenance Guide ACDelco® ... Spark Plug Seat Style: Conical: Heat Range: 16: Thread Diameter: 0.551" Resistance: 4-7.5 kOhm:Oct 25, 2020 ... I have AC 45 plugs in my engine. I have a super charger. Pro comp mag distributor. Taylor wires. Aluminum RPM heads. The gaps are all over the ...Note: This cross chart is for reference only. Please check specific vehicle application and owner’s manual. ... This ultra-wide heat range prevents spark plug overheating while providing reliable starts. HIGHER IGNITABILITY Illustration B ... AC-Delco Part # NGK Part # NGK Stock # 41-932 PZTR5A-15 7862 41-983 PTR4B-15 5146 41-985 IZTR5B11 ...and material, plugs produced by various manufacturers do not have exactly the same heat range. Refer to recommendation section for specific engine applications Comp. Part# … ….

The shop manual calls for 44-5? or 43-5... the newer AC plug books say R43S or R45S..Looks like a huge heat range difference between the two..Spark Plug Heat Range Cross Reference. Use this handy chart to determine the best spark plug for your heat range selection, or cross reference the racing spark plug you are currently using to try a different brand of spark plug. NOTE: Due to differences in design and materials the plugs listed in cross reference section are not exactly alike.AC Delco has posted there plug marking's for you to decode. but here is a decode for you. R - Resistor. 4- 14mm thread. 3- heat range. LT - Long reach, .715" (18.16 mm), Tapered Seat. T - Tapered Seat Shell Design. TS - Tapered seat with extended tip. LTS is a long reach tapered seat plug with a extended tip.Feb 2, 2010 · The spark plug heat range has no relationship to the electrical energy transferred through the spark plug. The heat range of a spark plug is the range in which the plug works well thermally. The heat rating of NGK spark plugs is indicated by a number; lower numbers indicate a hotter type, higher numbers indicate a colder type. A cold heat-range spark plug (left) can be identified by its rather shallow depth between the porcelain and the spark-plug body. A hotter plug (right) creates a …Learn how to select the correct heat range spark plug for your engine based on the design, modification, and use of the engine. Find out the difference …Due to different engine modifications and conditions,a hotter or colder spark plug may be required. To ensure correct spark plug application verify V.I.N.code on vehicle. 2.Prefix ^ sign denotes new part numbers available 11/96. 3.Part number 276S may be used for Header applications in place of P/N 276. 4.Part number 576S may be used for Header ...Ribbed suppressor seal extends resistance and helps prevent spark 'flash over' and misfires. Nickel-chrome alloy sheathing helps prevent corrosion on center electrode. Available for use in Marine applications. Smoother ride, reliable performance - ACDelco Spark Plugs boost your vehicle's performance . long-lasting performance, time and time …A discussion thread about how to read the heat range of AC Delco spark plugs. Users share their experiences and opinions on different plug types and …Could use a little help understanding AC Delco spark plugs (heat range) I have an AC Delco 41-602 in the car now. That was the recommended plug, however the engine is .60 over. The plugs are showing a rich running condition; dark brown on 1/2 or of the plug, some black coloration. I spent 1 hr. at the auto parts store and walked out with … Ac delco spark plug heat range chart, An AC Delco 41-110 is an iridium-single electrode, NGK spark plug with a diameter of 0.651″, has a lifespan of 53000 miles to 82000 miles, and is adjustable in Silverado combustion engine. It improves fuel economy from 12% to 14%, has low heat resistance can cost around $12 to $16. , For a spark plug to function properly, it must have a tip temperature high enough to burn off carbon deposits (self-cleaning) and avoid fouling, while remaining low enough to avoid overheating the ceramic firing end and pre-ignition., Is this AC delco R44TS a plug that burns hot? ... A C Plugs-----The two center numbers are heat range such as 42-----cold racing-high rpms ... T=tapered seat. S=extended tip. R44TS is probably the best AC tapered seat plug for street driving IMO. My personal favorite. von '69 Malibu Team Chevelle Member #15. Save Share. Like. C., Motorcraft spark plug heat range chartBosch spark plugs cross reference chart Spark plug ac heat range plugs delco numbering system chart forum k10 equivalent modern rods hot forums corvetteforum replySpark plug heat chart range ngk look misfire sparkplug temp plugs issues operating blasterforum temperature f150online jun gif., ACDELCO R43 Specifications. ACDelco Standard Spark Plugs are precisely engineered and manufactured to provide everyday reliability and efficient performance. A copper-core center electrode that helps provide improved heat transfer to the tip, giving you the reliability you're looking for while improving its resistance to low-speed carbon fouling., Check Details [infographic] spark plug heat range chart. Plug reference chart spark cross range heat accel champion academia pdf eduHeat range spark plug chart plugs ngk ac champion forums ranges reference cross pelicanparts porsche temperature forum vs size find 1 step colder plugs for n54Kozy heat slayton 42 reviews: …, The AC delco spark plug for that is a R43XLS. The alternate plug for that is a R44XLS. The 44 is a heat range higher. The variable here is that the motor is not 325 HP as its was stock back in 65. The motor is now between 420 and 435 HP. Should we run the hotter R44XLS or maybe somthing even hotter than that ? Do we need a cooler plug ?, ACDelco GM OE (Professional) Conventional Spark Plugs are designed for reliability and efficient performance, and are a high quality replacement ideal for many vehicles on the road today. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance. They are also available for Marine applications. Some ACDelco GM Original Equipment parts may have ... , Iridium allows for small, efficient electrode designs for reliable cold starting and quick acceleration. Iridium fine-wire electrode helps burn away carbon deposits on the tip of the plug as they form. See More. $9.49. each. In Stock. $13.10. Save $3.61., If you’re an automotive enthusiast or a do-it-yourself mechanic, you’re probably familiar with the importance of spark plugs in maintaining the performance of your vehicle. When it..., An AC Delco 41-110 is an iridium-single electrode, NGK spark plug with a diameter of 0.651″, has a lifespan of 53000 miles to 82000 miles, and is adjustable in Silverado combustion engine. It improves fuel economy from 12% to 14%, has low heat resistance can cost around $12 to $16. , Ribbed suppressor seal extends resistance and helps prevent spark 'flash over' and misfires. Nickel-chrome alloy sheathing helps prevent corrosion on center electrode. Available for use in Marine applications. Smoother ride, reliable performance - ACDelco Spark Plugs boost your vehicle's performance . long-lasting performance, time and time …, ACDelco GM Original Equipment R45TS Conventional Spark Plug. USD 2.17. AC Delco R45TS Spark Plug Set of 8 for Chevy GMC Buick Cadillac Pontiac Olds. USD 27.44. Denso (5330) ITF16 Spark Plugs, Pack of 4. USD 29.08. Denso (5330) ITF16 Iridium Power Spark Plug, (Pack of 1) USD 8.12. Champion Copper Plus 18 Spark Plug RV15YC4., Ac delco spark plug application guideFitfab: ngk tændrørs tabel Spark plugs plug heat range repair fig autozone guideSpark delco ngk plugs. Plug acdelco spark iridium ac chart delco plugs 41 heat pro each gm amazon professional glow warranty read comparison additionalPlugs spark ac delco plug ngk searched corvetteforum edited last pm Ac delco ..., Setting the ignition timing on a 350 engine means you synchronize the rotation of the distributor with the rotation of the crankshaft. This ensures that the spark plug at each cyli..., Get the Best Performance with ACDelco SPARK PLUG R44LTS6 parts at JEGS. Shop Now at the Guaranteed Lowest Price! ... Cooling, AC & Heating. Fans; Radiators; Water Pumps; Thermostat Housings, Filler Necks & Water Restrictors ... Manufacturer Heat Range. 4. Pack Of. 1. Package Depth. 1.10. Package Height. 3.60. Package Width. 1.10. …, Setting the ignition timing on a 350 engine means you synchronize the rotation of the distributor with the rotation of the crankshaft. This ensures that the spark plug at each cyli..., May 31, 2010 ... anyway how about this ? The AC delco spark plug for that is a R43XLS. The alternate plug for that is a R44XLS. The 44 is a heat range higher., Buy ACDelco Professional Conventional Spark Plug - AC R45XLS online from NAPA Auto Parts Stores. ... ACDelco: Spark Plug Thread Size: 14 mm: Seat Type: Flat: Electrode Core Material ... Spark Plug Seat Type: Flat: Spark Plug Hex Size: 13/16 in. Quality Level: Good: Hex Size: 13/16 in: Spark Plug Heat Range: NGK5: Buyer's Guide. Safety ..., When it comes to maximizing engine performance, one crucial aspect that often gets overlooked is the spark plug gap. A spark plug gap chart is a valuable tool that helps determine ..., Sep 18, 2023 · Spark plugs, glow plugs, household plugs, industrial plugs, and spark plugs for marine. Spark plugs, glow plugs, marine plugs, racing plugs, and plugs for household applications: Heat Range (colder) 43 55: Plug gaps: Properly gapped: Not gapped: Compatibility: Optimum for General Motors cars, Chevy, Buick, Cadillac, discontinued, and non-GM cars , ACDelco R44TS Spark Plug. USD 4.38. AC DELCO R44TS SPARK PLUG ASM. USD 6.77. Autolite Platinum AP25 Automotive Replacement Spark Plugs (4 Pack) USD 14.12. Autolite APP25 Double Platinum Automotive Replacement Spark Plugs (4 …, A single car has around 30,000 parts. Most drivers don’t know the name of all of them; just the major ones yet motorists generally know the name of one of the car’s smallest parts ..., DOUBLE PLATINUM SPARK PLUGS. An ideal plug for vehicles requiring platinum performance or older vehicles calling for regular plugs, ACDelco’s Double Platinum Spark Plugs can give up to 100,000 kms# of service in some applications. # Maintenance needs vary with different uses and conditions. See Owner’s Manual for more information., Nov 16, 2012 · If it the heat range is too hot, your engine could experience detonation, pre-ignition, or power loss. Most spark plug manufacturers recommend that the tip temperature remain between 500-850 degrees Celsius. Diagram courtesy of NGK Spark Plugs. Heat ranges are designated by each spark plug manufacturer with a number. , acdelco 41-801 3248 fr5gp 41-802 5760 pgr5c-11 41-803 3547 ur5gp 41-804 5555 pfr6g-11 41-805 3784 ptr5d-10 41-806 1041 zfr6a-11 41-806 3271 pzfr6f-11 41-807 7781 zfr5lp-13g 41-808 2685 fr4gp 41-809 3547 ur5gp 41-810 7740 ptr5c-13 41-810 97287 itr5h13 41-811 7159 tr55-1gp 41-812 3689 tr6ix 41-812 7740 ptr5c-13 41-813 2635 gr4 41-814 2467 ptr5a-13, ACDELCO REGULAR SPARK PLUGS (COMMON CHARACTERISTICS - J TYPE GROUND ELECTRODE, RESISTOR STYLE EXCEPT FOR 42XLS & 43XLS WHICH …, here is a cross ref chart AC to NGK. AC/Delco to NGK Spark Plug Cross Reference from ClubPlug.net USA. scroll all the way down and you will see plug specs. …, I worked in auto parts over 10 yrs. How the number relates to heat range changes based on who manufactured the plug. For AC plugs if the number ..., DOUBLE PLATINUM SPARK PLUGS. An ideal plug for vehicles requiring platinum performance or older vehicles calling for regular plugs, ACDelco’s Double Platinum Spark Plugs can give up to 100,000 kms# of service in some applications. # Maintenance needs vary with different uses and conditions. See Owner’s Manual for more information. , An ideal plug for vehicles requiring platinum performance or older vehicles calling for regular plugs, ACDelco’s Double Platinum Spark Plugs can give up to 100,000 kms# of service in some applications. # Maintenance needs vary with different uses and conditions. See Owner’s Manual for more information., ACDelco GM OE (Professional) Conventional Spark Plugs are designed for reliability and efficient performance, and are a high quality replacement ideal for many vehicles on the road today. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance. They are also available for Marine applications. Some ACDelco GM Original Equipment parts may have ... , Detailed Description. Spark Plug; ACDelco GM OE Iridium Spark Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These Iridium Spark Plugs are a high quality replacement for many vehicles on the road today. They are our latest in spark plug technology and an exact replacement for your vehicle's ...