NPP valves.
CF Community Team
Joined: Apr 2016
Posts: 14,038
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From: Pittsburgh
2025 C6 of the Year Finalist - Unmodified
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Race Director
Joined: Feb 2001
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From: Grapevine Tx
2018 C3 of Year Finalist
2016 C3 of the Year Finalist
Drifting
Joined: Jun 2019
Posts: 1,983
Likes: 902
From: near philly
IMO a mild to wild switch is only useful if you are somebody that wants to constantly go back and forth between full loud and base camry sound.
Personally the only times I have ever wanted the valves closed was on a multiple hour highway drive where the deep sound just wears on you.
Probably came up 5 times total in the 6 years I've owned the car.
Burning Brakes
Joined: Oct 2009
Posts: 1,065
Likes: 56
In the settings, I have the engine management sound set for 'Track', but I only drive in Sport & Touring modes.
I've noticed that the outer two exhaust trumpets get discolored, while the inner two do not. Is this normal?
Thanks
I've noticed that the outer two exhaust trumpets get discolored, while the inner two do not. Is this normal?
Thanks
Race Director
Joined: Feb 2001
Posts: 11,109
Likes: 1,980
From: Grapevine Tx
2018 C3 of Year Finalist
2016 C3 of the Year Finalist
I close mine when coming back from dinner at night in my neighborhood and also when I'm spending any amount of time on the freeway. We do that a lot around here.
Drifting
Joined: Jun 2019
Posts: 1,983
Likes: 902
From: near philly
the outter two are the open tips
the inner two are the closed ones
Tech Contributor
Joined: Oct 1999
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From: Charlotte, NC (formerly Endicott, NY)
Bill
