stab1991

Just had my 2015 z51 tuned and a set of ARH loong tubes with cats - stock cans. When I let off of the throttle, throttle amount doesn't matter, there is a crisp noise ( hard to explain). Only hear it between 1st and 3rd gears in between upshifts. I will try to get a video sound clip and post it. Its not a burble, in fact the first time I heard it with the radio on, I thought I was grinding the gear.

Anybody know if this is just the normal sound being heard much clearer, louder with headers?

Thanks

Fore58

Sounds like a leak somewhat.

bob guzzy

Maybe it is a loose heat shield or something touching the exhaust system.

stab1991

No, no noise on acceleration or at idle anywhere, I think it's revving up a bit when I step on the clutch. Like the car idles up when I take the load off the trans. I listened again, and it seems more like I have my foot on the gas when I hit the clutch, which I am not .

10mm_

It's probably something in the tune

stab1991

Thats what im thinking too