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RobZL1 · 07-15-2025, 11:38 AM

Too much boost with an X port and 22% lower for factory plug heat range. Defintely don't run a set of 5 heat range NGKs. Run a set of Brisk rr12s and gap them a little tighter. Prepare to replace them every 15-20k km though. Boost eats plugs.

07-15-2025, 11:38 AM	#3
RobZL1 fo'shizZL1 Drives: 2017 ZL1 Join Date: Aug 2017 Location: ATL Posts: 1,849	Too much boost with an X port and 22% lower for factory plug heat range. Defintely don't run a set of 5 heat range NGKs. Run a set of Brisk rr12s and gap them a little tighter. Prepare to replace them every 15-20k km though. Boost eats plugs. __________________ 2017 ZL1 M6 Black \| Maggie 2650 // 103TB // Big Gulp // CSP LT's & Ultra Cats // BMR MM // BC Forged KL13 Mods being installed- oil pump, cam, ported heads, dual in-tank, Goliath and XDI, corn, etc., etc.