ratio411

Chamber mufflers sound good, but the design is inherently restrictive. Even if someone custom made you a chamber with a 3" core ($$$), it would still have the same baffles/restrictions inside to clog things up... without those you have a bullet.
Just a heads up.

Time2Kill

iTrader: (49)

Aren't you the guy that first made the "homemade" gmmg exhaust? Or am I'm confusing you with some sort of true dual exhaust?

But anyways, I know the mufflers look restrictive, but adding a cutout to a GMMG system usually only gains ~3 to ~5 hp. That alone is proof that the mufflers flow excellent.