for the civic si, mugen only makes the rear section, and it makes power. perhaps a "universal" muffler won't do much, but the muffler, not the b-pipe, is the major bottleneck in a honda exhaust.autonomous R said:ive heard that the Mugen Twinloop axelback/silencer will give you hp gain w/out the b-pipe. Ive heard through the grapevine =). doesn't really make sense to me but it was supposively in a magazine.
60mm is a bit big for most mildly tuned motors upto and including 1.8Ls. Id go with 2".deMad10 said:Often times buying a muffler and custom piping is better because you can specify the diameter of piping most appropriate for your current setup rather than just buying a mass produced cat-back system setup to fit the average buyer.
The generic 60 mm piping is good up to about 200 whp. If you are pushing more than that then a custom setup would be more appropriate.
I would say more like 2.25. 2.25 will be good up to about 210 hp. That is what the average tuner would need.PseudoRealityX said:
60mm is a bit big for most mildly tuned motors upto and including 1.8Ls. Id go with 2".