When new my car used to get terrible pinking when accelerating. Sounded like someone pouring gravel on to a tin roof! Didn't make any difference what grade of fuel I used.

Under warranty my dealer remapped without any improvement. I then fitted a Kuryakin Air Intake but the car still pinked although it ran a wee bit better.

Finally upgraded to Stage One and pinking was eliminated and the car has always run much better both at standstill or accelerating.

I suffer from Tinnitus but don't find the Stage One exhausts any problem as the increased volume is a lower pitch. The air passing ones ears probably increases Tinnitus more than the exhaust note. This can be improved by wearing a hat with flaps, earplugs or beanie hat.

M3W 'The Mapmog' Built June 2015