We install some long tube headers on our LS2 CTS-V. We got rid of the nasty cat pipe that was on the car when I got it, and made the exhaust sound much better.

DNA Long Tube Headers: https://amzn.to/2NS7Onv
LS2 Header Gaskets: https://amzn.to/32SK5bh
ARP Header Bolts: https://amzn.to/37eul5C

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