Available in year/model-specific versions for Ironhead Sportsters (1957/1985), late Shovelheads (1981 and later), Big Twin Evo and Twin Cams and 1986 through 2003 Sportsters (intake and exhaust, some intake machining required), these PowerHouse valve guide seals from Hazelwood, Missouri based Mid-USA Motorcycle Parts are said to be "the best valve guide seals available."
Made from elastic Viton fluoropolymer, with 5% Teflon added to help prevent excessive valve to seal friction. A metal garter spring retains a constant valve seal to valve tension for precise oil control.
Additional features include a bonded steel jacket, providing a secure fit to the valve guide and internal ribs that are designed to easily slip the seal onto the valve guide without the use of a valve seal installation tool, but that still hold snug after installation. They are sold in packs of four.
Also seen here, and new to the PowerHouse range of valve train components this year, are the valve guide seals for 2004 and up Twin Cams (Metal Body Top Hat design) and 2017 and later M-8 engines with 'Supreme' Top Hat design.
MID-USA
www.mid-usa.com
www.mid-usa.ca
Mid-USA and PowerHouse logos
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