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AC Delco®
SET-AC17-4 RapidFire Performance Platinum Series Spark Plug, Set of 4

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Manufacturer #SET-AC17-4
Vehicle Info Required to Guarantee FitAdd Vehicle

Included in This Kit

Replaces OE Number
Spark Plug
AC Delco


RapidFire Performance Platinum Series
Spark Plug Code:
Electrode Tip Material:
Platinum Electrode Tip
Quantity Sold:
Set of 4
3 year, unlimited-mileage AC Delco warranty
Prop 65 Warning:

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material:
Copper Electrode Core
Gap Size:
OE Replacement

Vehicle Fitment Information

Vehicle Name
Fitment Information
1995 Ford Contour
GL Sport
4 Cyl 2.0L
1995 Ford Contour
LX Sport
4 Cyl 2.0L
1995 Mercury Mystique
4 Cyl 2.0L
1995 Mercury Mystique
GS Spree
4 Cyl 2.0L
1995-1997 Mercury Mystique
4 Cyl 2.0L
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Product Information


Fire up your engine with the rapid response and enduring, streamlined performance of ACDelco’s RapidFire Performance Platinum spark plug. Established in 1899, ACDelco manufactures original GM parts and premium OE replacement parts for other brands in the automotive aftermarket.

  • Tapered center wire electrode minimizes firing diameter for improved efficiency
  • Insulator’s ribless design provides secure seal
  • Required voltage for firing has been dramatically reduced
  • Solid state suppressor protects against compression leakage and radio interference
  • Engineered for enduring, streamlined performance
  • Wards off rust and wear over time
Need help?Call our product expert1-866-529-0412
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Warranty Policy
Right parts, guaranteed. If you find any defects, let us know within 60 days and we’ll take care of it. Check out our Warranty Policy for more details.
Shipping Policy
We ship fast so you can get on the road that much faster. Check out our Shipping Policy for more details.
Easy Return Policy
We’re only happy if you’re happy. If you’re not entirely satisfied with your order, you may be entitled to a refund. Check out our Return Policy for more details.

Product Q&A

What's the gap for this spark plug for a 2006 Chevrolet Malibu LT 2.2L 4cyl?DexterDec 13, 2023
Best Answer:Hi Dexter, I'm pleased to assist you. The spark plugs come with a preset gap of 0.042 inches or 1.09mm which is the recommended gap for a 2006 Chevrolet Malibu LT 4 Cyl 2.2L. It is important to note that these spark plugs are designed with a preset gap and are not intended to be adjusted. They should be installed as they are, without any further gap adjustment. Use the link below to place your order while the part is in stock. I hope this helps, and enjoy shopping! <a href="https://www.carparts.com/spark-plug/ac-delco/set-ac17-4?can=CPGG4850_CSQA_20231213" target="_blank">https://www.carparts.com/spark-plug/ac-delco/set-ac17-4?can=CPGG4850_CSQA_20231213</a>
Grace G.STAFFDec 13, 2023
Can you tell me are these spark plug pre-gapped?BrianAug 16, 2023
Best Answer:Hi Brian, I'm pleased to assist you. Yes, these plugs are pre-gapped. Click the link below to order while supplies last. Your order will come with a 30-day post-purchase price match guarantee. I hope this helps. Enjoy shopping! <a href="https://www.carparts.com/spark-plug/ac-delco/set-ac17-4?can=CPGG4850_CSQA_20230816" target="_blank">https://www.carparts.com/spark-plug/ac-delco/set-ac17-4?can=CPGG4850_CSQA_20230816</a>
Grace G.STAFFAug 16, 2023
Are these spark plugs set already?Sametra J.Jul 04, 2023
Best Answer:Hi Sametra, I'm glad to assist you. Yes, this is a 4-piece set. Click on the link below for direct ordering to take advantage of our limited stocks. I hope this helps, and happy shopping. <a href="https://www.carparts.com/spark-plug/ac-delco/set-ac17-4?can=CPAE1047_CSQA_20230704" target="_blank">https://www.carparts.com/spark-plug/ac-delco/set-ac17-4?can=CPAE1047_CSQA_20230704</a>
Arnel E.STAFFJul 04, 2023
I checked the gaping and they were all set to .040 but torque to what ?  I couldn't find that in its manual  .  I did 14.5 ft.lbs. that felt right .TankerEXPERTAug 06, 2023

Customer Reviews

Great product
Terry H.
Purchased on Aug 22, 2023
They were the size and was delivered in a timely manner.
Aretha P.
Purchased on Jun 22, 2023
Bought this set for my 2009 Escape. These plugs were pre-gapped at .040. This is not the OE spec for my vehicle. This is noted in the description. Check your user manual and be prepared to set the gap. The set arrived quickly and I anticipate no issues.
Joseph P.
Purchased on Nov 26, 2023