STI engines have all the "extra" touches that a true "team" engine has and they are now available to the public.

STI engines feature serialized crankshafts, cases and rods for better quality control. Each crankcase is hand selected and blue printed for the best tolerances. The sleeve is hand matched to the case to improve the flow through all the ports. The connecting rod features a surface treatment that ensures maximum strength. The crank shaft has an aerospace coating to improve durability and performance. Premium bearings are hand matched to the crank shaft and case tolerances. Add this all up and you have true factory team performance.

Designed for the Truggy class, the S28RSTI is one of the hottest engines for Truggies going. The added displacement along with the STI modifications make this engine a monster! There is no more technically advanced truggy engine on the market.