Billet 7075 alloy velocity stack to fit Keihin FCR 35mm - 41mm carburetors.
Precision machined from a solid piece of tough 7075 billet aluminum alloy. This 60mm long velocity stack will fit 35MM - 41MM KEIHIN FCR and FCR-MX models. Designed for specifically for use on Yamaha SR, XT, and TT singles. The additional length enhances engine torque.
7075 is an aluminum alloy, with zinc as the primary alloying element. It is strong, with a strength comparable to many steels, and has good fatigue strength.