C5 Corvette Spark Plug

Here you will find OEM and aftermarket C5 Corvette Spark Plug options and specs for your Corvette.

C5 Corvette Spark Plug

OEM Plug (What it Came with from the Factory)

OEM Manufacturer: AC Delco

Gap: .040"

Construction: Iridium Plug (Electrode)

Suggested Change Interval: 100,000 Miles

Number Required: 8

Why Iridium?

The C5 Corvette Spark Plug uses Iridium for several reasons. Firstly Iridium is a very hard transition metal of the platinum family. On the periodic table its the second densest element. This makes it perfect for spark plug longevity. Next its the most corrosion resistant metal! Even at temperatures of 2000 deg C.

Where Iridium is found? With annual production of only 3 tons its one of the rarest elements on the planet. Mostly found in clay and extracted in a very labors method which makes it very expensive to mine.

Meteorites are found to have greater abundance of Iridium than whats found in earths crust. Its speculated that a large meteorite made partially of Iridium crashed into earth and wiped out the dinosaurs 65 million years ago.

So the next time you fire up your Corvette thank the dinosaurs for paying twice so that we can enjoy the best sports car ever. Ironically its the Iridium from the same meteorite that is once again helping bring fire to what was once was their existence.

Spark Plug Performance

Delivered by the ignition coil and through the spark plug wires. Spark plugs create an electrical arc to ignite the fuel air mixture.

Do they make Spark Plugs that give you more power. The short answer "No". At least anything that you will be able to feel in the seat of your pants. Do they make some that might add 2-3 hp sure.

More importantly you want consistent operation and lack of misfires. This lowers emissions and allows individual cylinders to deliver their full potential. As plugs age this misfire rate will increase. Electrode wear and fouling cause this more frequently as time in service and combustion contaminants degrade plug performance.


Non OEM Aftermarket Spark Plugs

Spark Plug Construction

Corvette Spark Plug

Return to C5 Corvette from C5 Corvette Spark Plug




Share this page:
Enjoy this page? Please pay it forward. Here's how...

Would you prefer to share this page with others by linking to it?

  1. Click on the HTML link code below.
  2. Copy and paste it, adding a note of your own, into your blog, a Web page, forums, a blog comment, your Facebook account, or anywhere that someone would find this page valuable.
Chris Trautman @ Corvette Assembly Plant 2019

About Us: Corvette Web Central | Owner Bio: Chris Trautman

Established in 2008 by Chris Trautman, Corvette Web Central quickly grew into one of the top leading Corvette enthusiast websites globally. 

"This website is a passion of mine just as much as being a Corvette owner," says Chris.  He was frustrated trying to find information on the internet about Corvettes which was was not biased or influenced somehow. 

He has owned three Corvettes over the last twenty years and does not plan to stop owning one anytime soon.

Note: Some links on this page are part of our affiliate program and provide a small portion of proceeds to fund the administrative costs and to fund more product reviews.  We are not paid to perform the reviews or are we given any products for free.