My Corsa axleback with NPP valves is super quiet in track mode at hwy cruising.
It starts loud but quickly quiets down. Here is an idle video (car has no other mods):
https://youtube.com/shorts/lyVjC6vFZ90
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2022 Camaro 1SS 1LE 6-speed
Last edited by paradigm; 04-10-2024 at 10:13 PM.
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