#Corvette

This LS3 Corvette with just under 60,000 miles, recent purchase. Headers added and after the market air intake. On the Dyno, it was experiencing what is called knock retard that the computer was picking up and removing some spark advance. No audible pinging and nothing fell in the pedal so most likely the computer seeing something it didn’t like and pulling timing before it was a possible issue. After speaking to the client, he advised he never changed the plugs since he bought it with 40,000 miles on it. All in all it did good numbers and pulls good on the street.