Deffenitly a great product. Took no time at all to install. It goes great with my yoshimura exhaust. It did lower the db a tiny bit but that's not a issue. I still having some tuning to do. It does bog down a bit. I also have the power commander 5 installed with protech mo-flow air box lid. With power commanders map installed for the yoshimura rs2 full exhaust with air box lid removed.
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Makes my crf230f a little quicker on the single tracks .So I can keep up with my son .
this header pipe fit perfect on my bike and made it have a noticeable about of low and top end grunt
I have rode my KX450F but a few times since installation but I could tell a big mid range power difference. I have the fmf 4.1 behind it and the combo is nice.
easy install and man did this wake the bike up. Nice that fmf finally has the o2 bung for the bikes that need it.
Adds a good amount of power with a powercore 4. Sounds and looks great too.
Great product. My yfz performs much better since installing this unit. I purchased this along with the fmf factory 4.1 exhaust.
This header looks great and really boosted power .
Not a bad looking but at lease it quiet for where I go other than that it kick good