Muffler delete vs npp open valve sound - Page 2

18ss376 · 11-19-2018, 07:19 AM

I have a 25% hearing loss from drag racing for 30+ years, so I like the quiet touring mode most of the time. Track mode for the few time I drag race it.

Spartan268 · 11-19-2018, 03:07 PM

Quote:

Originally Posted by 2SSummitWhiteSix

I'm curious as to the answer of the OP's original question??? Can anyone speak to the sound of a non NPP muffler delete vs. an NPP open valve sound?

The muffler delete definitely has more resonance and the noise travels not just only inside the car but outside too. Plus it is a bit more boomy. When I start my car in the garage with the NPP it never shook the house. Now when I do a cold start post muffler delete with NPP it resonates throughout the house and vibrates a little. My fiance claims it is louder when she was tailing me but to me it sounds the same when it comes to WOT.

11-19-2018, 07:19 AM	#15
18ss376 Drives: Camaro Join Date: Sep 2018 Location: USA Posts: 520	I have a 25% hearing loss from drag racing for 30+ years, so I like the quiet touring mode most of the time. Track mode for the few time I drag race it.

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