[Luminous]

I had been using the s55 plugs gapped to 0.18 with my Enzo tune after the stock ones blew out. They ran great for 12k miles until installing port injection and turning up the boost. Started to notice the car breaking up above 22psi, and eventually experienced a few misfires, all on cylinder 6. I replaced them with N20 plugs gapped to 0.18 and the car runs great, even up to 25psi. Seems the N20 plugs are great for high boost applications!