Due to the noise or bad performance it gave? I would think all exhausts tend to give close to the same number in horsepower gains, but noise would set one over another.

 

I think that unless an exhaust is exeptionally terrible, most people grow to love their exhausts. I mean, the definition of a bad exhaust changes with the weather. The only thing people tend to agree on is that sounding like a Honda sucks, but that isn't even defined either.



I had open headers for eight months and I loved it.



http://www.youtube.com/watch?v=KqlWgUm1bxg

 

yes i bought a moroso sprial flow muffler and i absolutely hate it-...



you can hear the inside vibrating within.



my new exhaust theory is to find a muffler/sound you like and then make the power you want w/ someother part not vice versa.

 

All I can say is I love my Borla. Sounds magnificent.