Highly recommended for use with the Koso Big Bore Kit and 4 valve cylinder head

Highly recommended for use with all engine upgradesIncreases oil flow by 40%Helps prevent engine failure and lowers oil temperature

Koso ceramic coated big bore cylinder kit forged w/4-valve piston and gasketsKoso 4-valve cylinder head (complete with camshaft, rocker arms, intake manifold, and all other parts shown in the picture)Not legal for use in California on pollution...

Intake tube allows for higher air volume to enter the stock Grom airbox

Connecting tube is designed to connect the stock Grom airbox to the Koso 34mm throttle body

Intake manifold port is larger than stock and is size matched to use with the Koso throttle bodyInclude all gaskets needed and instructions

34mm Throttle body for increased performance compared to stock 30.5mm throttle bodyIntake manifold port is larger than stock and is size matched to use with the Koso throttle bodyIncludes all gaskets needed and instructions

Includes a ceramic coated cylinder, 61mm forged piston, rings, pin, pin clips, gasket kit, and banjo boltsCompression ratio of 11.5 to 1 allows the use of premium pump gas to keep the reliability of the stock motor