Quote:
Originally Posted by XfireZ51
So Mike, u pass Cali emissions w the headers and cats?
Are u saying u get drone w the Z06 NPP?
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No, sadly, the long tubes and LS7 cats had to come off to pass the visual part of the inspection. Depending on if I still have the car in 2017, I wanted to do aftermarket mufflers on my stock exhaust set with bmw vacuum actuators I have.
The big 3" SW catback with their fairly loud mufflers still droned lugging in 6th gear, but generally speaking, it didn't drone with the flaps closed.