I think you should go with t5s.If you are going to get t5s, make sure you buy the pro rider kit from toomey.com. Mine runs perfect. Toomey really did a great job on this kit. It comes with a 2:1 high flow airfilter with outerwear pre-filter,(eliminates airbox) perfect jet kit, boyesen power reeds,pipes, silencers, stinger tubes, and a metal clamp for the silicone seals. The only bad thing about this is that you will have to either buy or custom make a coolant bottle bracket. Whole kit costs 700 dollars.