what is the best performance kit to get the most horsepower out of a ds650

 

good question-
1-piston 300 cams 300 valve springs 200- total- 800 no labor
2- 720 cylinder and piston- 1050 cams 300 springs 200 cut head 100- total 1650
3- 760- 5000 base price.
4- mr hp has some engine mods not sure on price.

 

I like #4 IMO