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Vehicle Info Required to Guarantee FitAdd Vehicle

4503 Platinum TT Series Spark Plug, Sold individually

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Manufacturer #4503
Vehicle Info Required to Guarantee FitAdd Vehicle


16 mm Hex Size; (1) Ground Electrode; Flat Seat Type; Titanium Enhanced Twin-Tip Ground Electrode Tip Design; Twin-Tip Configuration
Platinum TT Series
Electrode Tip Material:
Platinum Electrode Tip
Quantity Sold:
Sold individually
1-year or 12,000-mile Denso limited 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:
Nickel Copper Alloy Electrode Core
Gap Size:
0.04 in.
Heat Range:
0.75 in. Reach
Recommended Use:
OE Replacement
Thread Size:
14 mm thread size

Vehicle Fitment Information

Vehicle Name
Fitment Information
1986 Chevrolet Corvette
Indianapolis 500 Pace Car
8 Cyl 5.7L
1986-1991 Chevrolet Corvette
8 Cyl 5.7L
1987-1990 Chevrolet Camaro
8 Cyl 5.7L
1988 Chevrolet Corvette
35th Anniversary Edition
8 Cyl 5.7L
1988-1989 Buick Skylark
4 Cyl 2.3L
Page 1 of 232 | Showing 1 - 5 of 1160 results

Product Information


Denso's Premium Class Platinum Twin Tip Spark Plugs revolutionary twin tip design provides better ignitability for a more powerful and fuel-efficient combustion yielding better engine performance in terms of power and fuel economy.

  • Greatly improves mileage
  • Provides more power and faster starts
  • Reduce carbon emissions

Founded in 1949, DENSO is a leading aftermarket supplier of innovative, OE-quality products and technologies in the automotive industry.

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

How many spark plugs needed for 2005 Honda pilot?Bridget O.Feb 16, 2023
Best Answer:Hi Bridget, I'm glad to be of assistance to you. As Thomas mentioned, the number of spark plugs is determined by the number of cylinders in your 2005 Honda Pilot. This plug is for a 6 Cyl 3.5L engine. If interested, click on the link below to place an order at a discounted price today, while supplies last. I hope this is helpful. Enjoy your CP shopping experience! <a href="https://www.carparts.com/spark-plug/denso/np4503?can=CPGG4850_CSQA_20230216" target="_blank">https://www.carparts.com/spark-plug/denso/np4503?can=CPGG4850_CSQA_20230216</a>
Grace G.STAFFFeb 17, 2023
Do these plugs fit my 03 Toyota Tacoma  either  a 2.4 / @ 2.7 ??Diana c.Feb 06, 2023
Best Answer:Hi Diana, thank you for reaching out. Yes, they do. This item fits the 2003 Toyota Tacoma with either a 2.4 or 2.7-liter engine. You can use this link to continue ordering the part at a discounted price today: <a href="https://www.carparts.com/spark-plug/denso/np4503?can=CPAP3648_CSQA_20230206" target="_blank">https://www.carparts.com/spark-plug/denso/np4503?can=CPAP3648_CSQA_20230206</a> I hope this helps. Enjoy shopping.
Aldrin P.STAFFFeb 06, 2023
Hello will these spark plugs fit in a 01 Toyota Corolla 1.8L LE?Tyrone B.Oct 20, 2023
Best Answer:Hi Tyrone, I'm glad to assist you. Yes. It is guaranteed to fit your 2001 Toyota Corolla LE 4 Cyl 1.8L. Grab our discounted price and click the link below to buy it today. Happy shopping! <a href="https://www.carparts.com/spark-plug/denso/np4503?can=cpje1043_CSQA_20231020" target="_blank">https://www.carparts.com/spark-plug/denso/np4503?can=cpje1043_CSQA_20231020</a>
Jeonino E.STAFFOct 21, 2023
Are these spark plugs pregapped?Pedro T.Feb 23, 2023
Best Answer:Hi Pedro, I'm glad to assist you. Yes, they are. Click on the link below for direct ordering to take advantage of our ongoing discount and limited stocks. I hope this helps, and happy shopping. <a href="https://www.carparts.com/spark-plug/denso/np4503?can=CPAE1047_CSQA_20230223" target="_blank">https://www.carparts.com/spark-plug/denso/np4503?can=CPAE1047_CSQA_20230223</a>
Arnel E.STAFFFeb 23, 2023
Do these spark plugs need to be Gap for my Toyota Corolla LE 2004?Arquise E.Jul 24, 2022
Best Answer:Hi Arquise, I'm glad to assist you. There is no need to gap the brand new spark plugs as long as it is a direct-fit vehicle-specific part for your car. This part conforms to the factory's spark plug's OEM specifications. This is a plug-and-play part for your car. Happy shopping! <a href="https://www.carparts.com/spark-plug/denso/np4503?can=CPJE1043_20220724" target="_blank">https://www.carparts.com/spark-plug/denso/np4503?can=CPJE1043_20220724</a>
Jeonino E.STAFFJul 24, 2022

Customer Reviews

Came in before shipping date!!!
Robert R.
Purchased on Feb 03, 2024
<a href="http://Carparts.com" target="_blank">Carparts.com</a> always has the right parts for what I need and get them to me in a reasonable time frame. I don’t like that shipping is not included on the larger purchases but there is still good value in their prices
Rob G.
Purchased on Aug 26, 2023
Fits perfectly
Bethany W.
Purchased on May 22, 2023