I mean SICK is a WICKED GOOD WAY! OMG, I have been looking for the right exhaust for a long time, over a year. I wanted an exhaust that was kinda loud, kinda deep and didn't sound like a rice burner for my 98 E 36 M3. WOW, the new Exhaust by Corsa is a truely amazing sound, and inside the cabin it sounds good, not too noisy, and not too quiet. Installation was easy with a lift, and the outcome is worth it! I recommend this exhaust to anyone looking for a deep growl, and a deep note, but also to someone who doesn't mind being a bit loud to anyone behind the car. Inside on the highway at 80, not too bad with the windows up the AC on, the car sounded somewhat quiet. I didn't notice too much of a difference in noise inside. My buddy and I switched cars, I climbed into his Z06 and he took my M3 for a spin. I tailed him to hear what it sounded like. AMAZING, and he had a big grin on his face and thought it sounded truly awesome. If I can find a way to get sound clip of it for you I promise to get it on here, but if you check out the UUC Motorwerks Website they now have some sound clips of the RSC-36, and in person it sounds even better! Happy Motoring!