Reviewed By Barry B (Mountain View, CA) Reviewed for a 2001 BMW Z3 —1/21/2015 8:06 PM
Flowmaster describes this "mild". This easily sets off car alarms with excruciating low frequency resonance when stepping on the gas at midrange RPMs.
Reviewed By RENE S (Arlington, TX) Reviewed for a 2005 Pontiac GTO —3/24/2017 6:48 AM
These Super 40's really woke the car up. Very noticeable gain in acceleration. I also had my muffler shop install an X-Pipe and wow did this pairing wake this GTO up. Spent half of what a cat back system would of cost.