I just wasn't too keen on the smell lol. Most of my friends didn't mind. I guess I just have a sensitive nose. Now regarding power and sound, it was day and night. It pulled so hard on map 2 and the exhaust tone was perfect.. not too loud or quiet. For the price, it's definitely a good upgrade.
SOLD: 2011 E90 335i: Alpine White, 6MT, 30% Tint, V1 Hardwire, Performance Grilles, LUX H8, M-Sport Rear Bumper, JB4 Stage 2, BMS Downpipe, BMS Intake.