Quote:
Originally Posted by ahesq
Factory GM NPP dual mode exhaust definitely has drone 1200-2000 rpm, no question about it. It's getting quieter as I put some miles on my new system (400 miles so far), but 6th gear on the highway while applying any throttle breeds a headache. They should have engineered these mufflers better. However, wide open throttle above 3000 rpm sounds awesome.
Checked out welding J pipes like on the Borla system, but there is no room with the existing factory NPP mufflers.
|
Same here. I'm debating on going the J-pipe route on my NPP mufflers. When I first had the exhaust installed I thought I could deal with it but then again as time went on...the drone was also giving me a headache.