The Tusk Cylinder is a direct OEM replacement to your worn-out factory cylinder. Built to OEM specs, the Tusk Cylinder is made from electroplated nickel silicon carbide and cast aluminum to give you the same OEM construction, look, feel, and performance that you are looking for. Don't break the bank when it's time to break into your top end. Look no further than Tusk for high-quality OEM replacement parts.