Top End

Heads come completely assembled with valve seats, valves, guides, seals, .590" lift valve springs, collars and valve keepersComplete kits also include rocker cover gaskets, head gaskets and miscellaneous hardware with instructionsUse OEM manifolds and...

Heads come completely assembled with valve seats, valves, guides, seals, .590" lift valve springs, collars and valve keepersComplete kits also include rocker cover gaskets, head gaskets and miscellaneous hardware with instructionsUse OEM manifolds and...

Heads come completely assembled with valve seats, valves, guides, seals, .590" lift valve springs, collars and valve keepersComplete kits also include rocker cover gaskets, head gaskets and miscellaneous hardware with instructionsUse OEM manifolds and...

High port flow gives great performance now, and more later when additional upgrades are doneHeads are fully assembled with springs and valvesCompression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see Compression...

High port flow gives great performance now, and more later when additional upgrades are doneHeads are fully assembled with springs and valvesCompression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see Compression...

S&S heads give great performance, and work with additional upgradesKits are fully assembled, and include stainless steel valves and high-lift springs (up to .640 lift)Intake manifold, pistons and gasket kits are sold separately; gasket kits contain head...

Include a set of S&S Shovelhead-style cylinder heads, a pair of S&S stock bore cylinders (3-7/16" for 74" engines or 3-1/2" for 80"), forged 8:1 compression pistons complete with rings and wrist pins, manifold clamps, manifold seals, all required...

Include a set of S&S Shovelhead-style cylinder heads, a pair of S&S stock bore cylinders (3-7/16" for 74" engines or 3-1/2" for 80"), forged 8:1 compression pistons complete with rings and wrist pins, manifold clamps, manifold seals, all required...

CNC-machined dowels used for locating cylinder headMade in the U.S.A.

CNC-machined dowels used for locating cylinder headMade in the U.S.A. Harley-Davidson -- 1200 Custom EFI XLC -- (2016, 2015, 2009, 2007, 2013, 2010, 2012, 2014, 2008, 2011, 2017, 2003, 2019, 2004, 2006, 2005, 2002, 2018); Harley-Davidson -- Forty-Eight...

Exhaust Valve Bellow - Polaris 817838 Polaris -- Indy XCR 440 -- (1998, 1999); Polaris -- XCR 800 -- (2000, 2002, 2001, 1999); Polaris -- Indy 600 Classic Touring -- (2001); Polaris -- Indy XCR 440 Edge SP -- (1999); Polaris -- Indy XC 500 SP -- (2000,...

Exhaust Valve Bellow - Polaris 817837 Polaris -- RMK 600 H.O. w/155" Track -- (2007); Polaris -- RMK 600 H.O. w/144" Track -- (2007); Polaris -- RMK 700 w/151" Track -- (2005, 2006); Polaris -- Indy XC 800 SP (M-10) -- (2005); Polaris -- Edge Touring 600...