GXP NGK TR-6 in #7 completely MELTED....we later discovered after so many hours and weeks of research and craking everyones head open and ruling out AFR and doing WOT test as well as compression test and checking the oil for detonation etc...we took the car to Cozzolinos and tunned in the N2O....that we needed to switch to the NGK BR-7's. The car is happy now...but before that we installed all brand new TR-6's again....so I have a lot of spark plugs...