herbojfl

Does anyone know if the stock NPP exhaust for the Z06 and ZR1 is the same? Do they sound different with the flaps open?

RicK T

First, your terminology. NPP does not apply to the Z06 or ZR1 bi-mode mufflers. NPP is exclusive to the LS3 engine.

Prior to 2011, the Z06 mufflers were/are different. In stock configuration they are quieter than either the NPP or ZR1 mufflers. Starting in 2011 the Z06's got a "similar" muffler to the ZR1. I have no independent knowledge, only what has been discussed here, but it appears the 2011+ Z06 mufflers are a different part number than the ZR1 but most say they now sound the same.

I found this thread that might help explain it better:

http://forums.corvetteforum.com/c6-t...e-zr1-npp.html

peter pan

Z06 2011 is the same as the ZR1 cans, love the ZR1 cans on our Coupe