This is a SC PROJECT slip on installed with the standard bmw cat still on, under 3k Rpm, its pretty quite but louder than standard, when going up the gears and over 3k rpm it sounds nice and pops and bangs on the blipper, Recommended if you dont want to pay loads of money for a full system,
Welcome to the channel, this is a look around my BMW S1000RR
INSTAGRAM: Thestealthrr
