Quote:
Originally Posted by Forrest Nearing
Hushpower is a packed muffler...
Hushpower
you would probably see "slight hp increases" if you just put a length of 5" pipe in a 4" system
Borla is just an expensive, high quality, packed muffler... There's nothing to "grip" when it comes to diesel exhaust vs. gasser exhaust  |
I had one of their mufflers for testing and I can tell you now, there was no packing in it. I had pictures I posted but, must have deleted them. Maybe a certain series did.... maybe hushpowerman can shed some light. All mine had were cone shape perforated metal baffles. I installed it on my wifes truck and on the way home one night a strap broke. With nothing to strap it back up with I just drug it the rest of the way home. Needless to say, it had a nice size hole in it. No packing in site ???
Danville performance in Indy did dyno comparisons on their dyno that showed what I mentioned. The drone was the reason for the 5 to 4, more than hp was.