Carburator Mikuni Solex
Datsun Mikuni 44mm Velocity Stacks (Set of 4)TWM Induction/Borla Performance
US made NOT China!
These have been in our catalog for 8 years..50mm in length velocity stacks ( set of 4) RACE PART. Short bell full radius design allows 15mm of clearance when used with our ITG air filter kit for the Mikuni carburetors. Aluminum billet material NOT spun and certainly not universal made specifically for the 44mm Mikuni/Solex carburetors with the correct 48mm air entry diameter for uninterrupted air flow. Notice also how other brands have a bead at the front airway that is solid and not hollow which is a much cheaper way to manufacture.
Borla's bell design is inspired from the front aircraft jet engine nacelles designed to pull air through the radius thus smoothing out and improving air flow speed and velocity. With the roots of the design with TWM Induction in the 1990's these designs were actually air flow tested and then the design tuned for max air flow.05/31/18