intake manifold 21mm unrestricted for Minarelli horizontal, CPI, Keeway, 1E40QMB

Very low-cost intake manifold for derestricting the inlet port. This increases the size of the opening to 21mm. This is a must when using a larger carburettor. Even when used with the original carb, acceleration is increased. A sensible purchase if your manifold shows signs of wear or becomes porous. Carburetor Mounting dimension: 24mm