you got it man,HPD race pipe is the way to go,don't look back on your decision and you'll have a blast of fun even without the race mod kit
if jetted properly.

 

i have the same situation 420.....i have a FMF turbine core 2 and im planning to get the FMF gnarly and then call RCR and ask him what kind of clutching i should get

 

i hope you guys aren't serious about buying fmf pipe anymore,
if you want overall stock level rpm/performance without messing with clutch than go for dynoport pipe but it's a loud one tough,
i've tried a prepped race 250 trail blazer with a fmf once,what a lag
of power,,it even worse with their liquid cooled 400 exhaust.you'll not see too many fmf pipe running with great result on that one...

 

I said this in another post already. Don't buy the FMF. Not trying to tell you what to do but from everyones experience on this forum the HPD trail pipe is the way to go. Some people have had some luck with this pipe(RAJ) but not many. Just trying to help.[img]i/expressions/face-icon-small-smile.gif[/img]