u know i just love some manufacturers dyno charts. like cts especially. they show a stock yfz makin 35hp and with a pipe 48. lmao what bs. what i think they do is run knobbies on the stock quad and then throw slicks on the mod quad so u see a huge boost. nice gimic huh? go to www.gtthunder.com and see what i believe is unbiased true dnyo information. there they always run slicks and both 450s turn out about 40. he even shows a chart with knobbies and one with slicks and there is a huge difference! i just thought id mention this to the guys that didnt know what to believe

 

ha ha, on FMF's website, they say the Raptor 350 with the powercore makes 32hp !! ha ha, and the Z400 makes 24hp, ha ha. The ct thing is correct though, they tested it in dirtwheels. on CT's sight they said the rapp makes 39hp with it, dirtwheels got like 38.3 or something.

 

both of there numbers are way off. looks like fmf uses knobbies for everything. like i said no way is a yfz going from 35 to 48 with just a pipe. maybe 40 to 48