Stillen Gen3 Intake, Berk Hi-flow cat, and Stillen cat-back exhaust

t-ray

Axio, do you hear any kind of hiss when decelerating, as the car gains vacuum? I've heard it in a couple of vids/clips of different exhausts, and that hiss has plagued me for 4 years now on my g35.

For a while, I thought it was an exhaust leak. But I've been through 8 different exhaust configurations, and its been present since the first exhaust mod. I've heard it on other g's and z's as well, and I'm afraid it might just be some inherent trait of the motor.