F5M CNC Velocity Stack 25mmH x 44mm Dia. for Clamp on Filters
[F5M Velocity Stack sil]

F5M CNC Alloy Velocity Stack 25mm High x 44mm Diameter Silver

Velocity stack with 20mm inner diameter. This adapter allows you to use aftermarket clamp-style air filters with 1 3/4" inner mounting diameter. Precision machined for smooth air flow. 25mm height yeilds better low end power than stock. 30.5mm center to center bolt hole spacing. Dual outer grooves for sturdy clamp mounting. Fits Walbro WA / WT / WYK style carburetors. If using with a WT-style carburetor that has a butterfly choke, the center hole may need  need to be slightly enlarged  wide enough to accommodate the choke plate.

• For clamp on style air filters.
• Hole centres 30.5mm
• Longer intake tract for improved performance.   
• all sizes Approx..