factory pro velocity stacks/Dynoed..

[spamanglenn]

Seem to only work best with stock cams and cam timing,my new motor doesnt like them.A 2 up gen1 rider with slipons and stock cam timing would be very happy with them on the road.How many dyno test compare a 4 into 1 pipe compared to a stock pipe at 5,10,20% throttle,where 90% of riding occurs.If people saw those charts theyd never buy a 4 into 1.Same applies,better part throttle torque means a better streetbike.Anyone got some standard gen2 headers around? The x pipe is much better than a gen1,s and the pipe diameters are the same,so would be a good cheap upgrade with slipons for a gen1.Schnitz sell different length billet stacks and yes billet does sound better for sure.