4 PORT CYLINDER provides much more power! HEAD WITH LOTS OF DOUBLE COOLING FINS. ROUND DOME STYLE COMBUSTION CHAMBER.
BARREL HAS AN EXTRA BOOST PORT MACHINED INTO IT. 44mm PISTON HAS A DOUBLE WINDOW PORT. *piston is for 10mm pin.
If requires 12mm, please let us know in payment note. The 12mm piston has one window only.
