HHR Performance » Stringer Stacks

Ray Stringer, the creator of Stringer Stacks of Stringer Race Station (SRS) is a renowned engine builder & tuner, race bike builder, race team crew chief as well as a former British Superbike racer. Stringer Race Station has created Stringer Stacks, 3D printed velocity stacks for modern sports bikes that give improved performance throughout the full RPM range, much akin to race kit stacks. Stringer Race Station uses high-end 3D printers and materials to ensure a premium product at a competitive price. For bikes that come from the factory with variable stacks (R1 / R6 etc) Ray has designed and printed velocity stacks in durable materials resistant to fuel and other contaminants. Stringer Race Station has also designed their own servo-operated RPM-based variable stacks for bikes not equipped by the manufacturer with electronically controlled variable stacks (GSXR / ZX10R / CBR / Moto2, etc ) these servo-controlled stacks give a huge increase in performance and throttle response over OEM static stacks and have been rigorously tested in lab simulations, on the dyno, and on the race track. For riders who are not permitted to modify the airbox/induction of the race motorcycle in the series they are racing we also have the Lower Velocity Stack kits available.