I mean seriously...I only asked about opinions on each system. Not how I won't see any noticeable gains unless I go F/I. I'm doing these upgrades to make the car drive & sound better on the street/track. I'm not drag racing every car on the street or off the line. I would of bought a Mustang for that.
E90 M3 Jerez Black/Bamboo Beige 6MT - BMW CCA
Dinan Rear Exhaust, Secondary Cat Delete, Dinan High Flow Carbon Fiber Intake, IND Painted Reflectors, BMW Edition Grills