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Yamaha FX140 Velocity Stacks
R&D Velocity Stacks, Yamaha FX140/FX H.O. (set of 4)
Our Price: $54.02

The R&D Velocity Stack Kit is a direct bolt-on kit that replaces the restrictive OEM stacks. Designed to increase air velocity into the throttle bodies producing improved throttle response and top end speed. Easily installs with OEM hardware. Dollar for dollar is the highest performing velocity stack available.
RIVA Yamaha FXHO Velocity Stack Kit
RIVA FX Velocity Stack Kit
Our Price: $139.95
Out of Stock!

Designed to increase horsepower and torque throughout the RPM range on your FX140 or FX High Output. Our easily installed Velocity Stack Kit replaces the restrictive factory flame arrestors providing improved throttle response and top-speed. Kit includes four Velocity Stacks machined from billet aluminum that utilize o-ring seals and set-screws to lock onto throttle body and are anodized to prevent corrosion. Sold in sets of four. NOTE: RIVA FX Power Filter RY1325 is required when using Velocity Stacks to meet U.S. Coast Guard certified flame arrestor requirements. Power Filter is designed to work in conjunction with Velocity Stacks so as to optimize performance.