Ok My buddy wants to do more mods to his YFZ. Here is what he has on it now the Duncan Fatboy 4 Pipe & a White Bros Airfilter and the Alba Stroker kit and a Jet kit and PEP Front & Rear Shocks and Razr 2 Front and rear tires on ITP Race Rims.

 

how about the ESR or Woods intake system? Other than that he should be pretty set speed wise with that stroker kit.

 

Hey FMF! How big of a difference did he feel when he stuck the fatboy pipe on? Is it the full system?

 

Yes it is the full system.
It is a real good pipe. I seen a 7 MPH on Top end and some real good low End