2013 Pro 153 with SLP stage 4? going to be happy or?
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From everyone i talk to the slp stage 4 runs well but i think there would be more bang for your buck buying the Rk Tech drop in kit.
http://www.youtube.com/watch?v=LF8X58r8T6g
I read a post on this forum somewhere that was written by Vohk and he said that he prefers the Rk tech drop in kit over the slp stage 4.
Glassman who did your porting?Stage 4 kit dyno'd up here at 158 hp and 102 ftlb of torque. That is an Slp pipe, porting, head, Vforce, Air box mod and fuel controller. Not SLP porting, but I'm sure they are close. Worth the money IMO.