I was wondering what headpipe I should get I was thinking powroll, fmf megamax 2, or supertrapp 4" racing. Also what is stock main jet and what should I got to with the new pipe K&N w/ prefilter and 6 1" holes in airbox with prefilters. How much horsepower can I expect. Thanks for any help.

 

I'm wondering the same thing. I plan on getting the supertrapp isd2 complete system,k&n filter and outerwear,and drill the holes and put those prefilters in the airbox lid. instead of paying $100 for the k&n power kit I'm just gonna buy the jets and the filter. they are only $4.00 each. so how many should I get? what sizes? ok what size should I use when I first put my k7n filter with the holes in the air box? than what size when I put I put on my pipe?