You should buy stillen race pipe it reduces 16hp nearly . I know it is much expensive anyway stillen produces quality

 

The race pipe is simply a non-resonated testpipe...VERY loud and nothing but rasp. FI makes them as well. They are not usually used on the street though, because of the sound characteristics...and yes they are CHEAPER than the resonated pipes.

Remember, a non-resonated test pipe is nothing more than a piece of pipe and 2 flanges. The science behind a good or great resonated tespipe, is the size and quality of the resonator. FI uses, as far as I know, the largest resonator, 8", and produces a nice smooth sound, and no rasp...with a caveat though: FI can't guarantee no rasp, because many aftermarket exhausts are not capable of handling certain flow characteristics or pulse levels.

If you want similar performance, roughly 2-3HP less - and a much more exotic sound though - FI's 300 and 400 Cell HFC's work excellently.

Rick

Rick

 

+1 for FI products

i myself have the 300 cell cats and am very happy with them!