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St. Jude Donor '13
Hi,
To do Z06 mufflers and not NPP's you will need a h or x pipe that goes from 2.5" to 3" to mate to the ls2 cats or install the ls7 exhaust manifolds and ls7 cats and z06 h pipe .
NPP mufflers bolt right in without a h pipe mod needed as they are 2.5" pipes.
You will need the vacuum lines and vacuum solenoid to open and close the valves and a controller to open and close them.
I did this mod and I am very happy with the results.
With the valves open on the freeway there is a LOT of drone. The overall loudness in the higher rpm range is not super loud, just throaty.
Quieter than bullets for sure.