|
My Challeger was whisper quite. My 1SS base dual exhaust is OK quite. I've heard the NPP and absolutely hated it both closed and especially open.... I've added front cat bypass and it is just a tinge louder when I get on it.
__________________
Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
|