Engines are bigger and performance motors require a lot of air flow to create serious power. The purpose of a velocity stack is to increase it into the throttle body/ carb’s throat for optimized fuel delivery.
Roland Sands state that his Nostalgia Velocity Stack even smooths this air flow. CNC-Machined From Billet Aluminum with a RSD Logo Laser Engraved, and featuring a backing plate drilled for the breathers sold separately.
Provided with an included stainless steel wire mesh screen and necessary chrome hardware. Chrome or black anodized. For Big Twin Evos or Twin Cam Harley type engines with CV and S&S Carburetors. At your Drag specialties dealer. Roland Sands Design.