rjkrumb

Anbody removed the fiberglass out of npp mufflers to get a little more sound from them? I replaced stock mufflers on base coupe with zo6 npp mufflers and not real happy with sound would like a more aggressive sound. Would the sound be on the tinny side with a lot of drone? Any sound clip's? Or am I just better off leaving as is. Thanks

MUKAK

HOXXOH

You need to first identify if they are really Z06 mufflers or ones from the NPP option. They are NOT the same.

MUKAK

what about if i have 2012 Zr1 mufflers with Xpipe, can it be made louder also?

Z06Brucey

I have Z06 mufflers with the muffler mod. I cut the muffler open and clamped off the perforated pipe and put half of the packing back it. Got much louder and sounds more aggressive.

rjkrumb

They are off of a zo6 they do have the vacuum operated valves

HOXXOH

All the C6 bi-mode mufflers are vacuum operated.
See post #5 for the muffler mod. You might check on the Z06 forum for more details.

ptroxx

my car at 20 sec with no material in mod... took it all out

ptroxx

C6z06man

I did the muffler mod on my Z06. Sounds great. I'd recommend that mod if you don't want to buy an exhaust and want it louder.

RicK T

Z06 "muffler mod"..............'06-'10 only.


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