Put it on today.I used the stock carb to see if their was a difference.It has alot more topend for sure and mid is still really good.Just a little loss on the bottom but i havent got it jetted just right yet.Im going to get the stock right tomorrow and then put the 38 pwk on and get it right.Im just seeing what all work and work the best.But it looks good and sounds really good.alot a difference in sound from the FMF pipe and silencer.