View Full Version : reducrd top end

01-31-2008, 05:41 PM
I just installed a set of 3" slip ons onto an evolution engine that is concidered a mild stage three. I fit slip ons over 1 3/4" drag pipes and left the overall pipe length at 41''. It seems I have lost some top end roll on speed and seems to restricted. would i shorten over all pipe length to gain top end?

02-01-2008, 07:01 AM
If you have SuperTrapp slip ons with the disc assembly try adding more discs for more flow.