
The LT4 runs higher cylinder pressures than a Camaro SS. Spark plugs must fire cleanly under 650 HP and 650 lb-ft of boost. Worn plugs cause misfires that feel like transmission issues or boost cut — easy to misdiagnose without a scan tool.

Refer to the points below for specs, intervals, and service tips.

When plugs are due, inspect air filter, belts, and brakes. Hard acceleration and hard braking both stress heat-managed systems on a ZL1.
Learn more in our Camaro ZL1 maintenance schedule.
Complete the platform with brakes that match LT4 power.
Shop Camaro ZL1 Brake Kits
