At what point is it a must to upgrade the stock exhaust? When I had my GCSRT8 the stock exhaust was good for much higher than the factory 420HP. So I wasn't sure if the cobalts exhaust was the same way. I'm looking at getting the ZZP stage 3 w S3 H/E and 2.8 or 2.7 pulley, bad-mab header and ZZP 3" dp. I'm assuming my exhaust will be completely maxed out at this point, and I will need to upgrade but I want to make sure. I bought the car with what appears to be the muffler in the middle of the car was deleted and straight pipe installed.(didn't know if that would make a difference) I've searched these forums and can't come up with a answer to my question. Thanks for all the help.

Ryan