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Genuine Cheetah Cylinders! Trinity Racing R&D releases the new 90+ horsepower 421cc Powervalve Stroker. Powervalve Technology combined with Stroker technology! You and your Banshee will win races with lightning quick throttle response and a neck snapping torque curve of this incredible system. You will retain bottom end power and torque as the variable port timing of the powervalve corrects for the low rpm range, then opens for the massive high rpm power. This incredible kit is comes ready to assemble and go (case modifications are not needed) Buy it today, Ride it tomorrow! The 421ST Powervalve includes: One-piece alloy twin nickle-sil Cheetah cylinder Complete Powervalve cylinder assemblies Your choice of Porting New O-ring cylinder head with mod (Turbo optional) Pro-Lite Forged pistons V-Force Reed cage assemblies New 4mm Stroker Crank Stage IV gaskets Optional Stage IV Superlite pistons may be added from the Engine Performance section.
