Setup was to pass sound limits at Laguna Seca. 3-piece Bimmerworld Race Exhaust 3.5" Section 1 and 2 only. You will need a BW section 3 to run a full exhaust setup which you can buy separately from BW.
Includes swappable section 2 to pass sound limts. Didn't measure sound, but passed 104 dB day at Laguna. My guess is around 100 dB. Setup costs $1169+ at retail.
(1) BW Section 1 Y Pipe
(1) BW Section 2 Unresonated
(1) BW Section 2 with custom Vibrant Performance muffler w/ custom hanger