[keystonemedical]

Originally Posted by FoundNemo

I've read quite a few folks (C7 and ZL1) noting a loss of low end torque a bit down low with the 2nd cat delete on an otherwise stock exhaust. No CEL but when I had my 12 ZL1 I also noticed the same with the 2nd cats gone when i deleted them on the stock exhaust. Interesting and not sure why.

I could see that, could be a back pressure thing.

[Chris C 1SS 1LE]

Originally Posted by Rlhay2

A solid thumbs up for the Corsa double helix. At cruising speeds with the stock suitcase the car is as quiet as stock, and this is with headers. And it is disturbing the peace loud when given full throttle!

Great description. I like it!