I have had mine for 3 years. It's great for the track and with the high flow cat, you definitely feel more power. However, it is loud at mid peddle. After a few weeks, I put in a glass dampner on either side, then things were much tamer when I wanted them to be and sounding like thunder when opening up.
2008 Redline Sky
White Exterior/Black/Red Interior
GMR Tune, GM CAI Intake, Solo Performance Cat and Street Race Exhaust, Dejon IC Pipes, Sport suspension upgrade, Monsoon Stereo, Opel Short Antenna