Engine & Performance

James Gaskets Seal Washer Neutral Switch. Nylon – 1980–1997 5-Speed Big Twin; 1986–1999 XL… White nylon washer for the neutral indicator switch on ...

James Gaskets Seal Washer – 1965–1986 4-Speed Big Twin : Neutral… Red fiber. Multiple applications. OEM replacement reference 25811-11 / 462-11. Fi...

James Gaskets Brass Seal Washers. Oil Pump Body Plug – L1950–1986 Big Twin OEM replacement reference 6377. Fitment L50-86 Big Twin (NU) Product Det...

Mikuni Smoothbore Pump Nozzle, 70 HSR 42/45/48 Product Details Brand: Mikuni Category: INTAKE > CARBS MIKUNI REPL PARTS Unit: 1 Product cod...

Mikuni Smoothbore Pump Nozzle, 60 HSR 42/45/48 (std size) Product Details Brand: Mikuni Category: INTAKE > CARBS MIKUNI REPL PARTS Unit: 1 ...

Mikuni Smoothbore Pump Nozzle, 50 HSR 42/45/48 Product Details Brand: Mikuni Category: INTAKE > CARBS MIKUNI REPL PARTS Unit: 1 Product cod...

James Gaskets Brass Seal Washers – Brake Grease Fitting Rear: 1961–1978 XL… Various applications. OEM replacement reference 6156. Fitment Brake gre...

Gardner-Westcott Head Bolt Kit, 12-Point. Chrome – 1948–1984 Big Twin Chrome plated. Traditionally used with big bore cylinders where space is limi...

MCS Rocker Arm Shaft. Import – 1957–1985 XL Sportster OEM style replacement. Repl. 17435-57B. Note: On 57-70 XL models the 71-85 end plug must be u...

K&N Air Cleaner Assembly. 51mm Diameter – 38mm Mikuni Round Slide Carburetors Open filter universal clamp-on style air cleaner. - 130mm diamete...

K&N Air Filter Element XL Sportster – 2004–2013 XL Sportster - Shape: Rectangular - Height: 1.50" (38 mm) - Outside length: 8.438" (214mm) - Ou...

K&N Air Filter Element – 1988–2003 XL Sportster - Shape: Rectangular - Zinc plated metal top - Height: 1.75" (44mm) - Outside length: 8.438" (2...

Manley Valve Guide Seal Set. Viton 4-Pk – 2005–2017 Twin Cam; 2004–2022 XL… With 4 seals. Comes with with built-in spring-loaded Viton wipers. Valv...

Manley Valve Guide Seal Set. Viton (24) – 1984–1999 Evo Big Twin; 1999–2004 Twin… With 24 seals. Comes with with built-in spring-loaded Viton wiper...

Manley Valve Guide Seal Set. Viton 4-Pk – 1984–1999 Evo Big Twin; 1999–2004 Twin… With 4 seals. Comes with with built-in spring-loaded Viton wipers...

Manley Valve Guide Seal Set. Viton 4-Pk – L1981–1984 1340cc Shovelhead With 4 seals. Comes with with built-in spring-loaded Viton wipers. Valve ste...

Manley Valve Guide Seal Set. Viton 4-Pk – 48-E79 Big Twin With 4 seals. Comes with with built-in spring-loaded Viton wipers. Valve stem seals can b...

Manley Valve Guide Seal Set. Viton 4-Pk – 1957–1985 XL Sportster With 4 seals. Comes with with built-in spring-loaded Viton wipers. Valve stem seal...

Manley Valve Spring Top Collar Set. Titanium – 1984–1999 Evo Big Twin; 1999–2004 Twin… OEM style replacement precision machined titanium valve spri...

Manley Valve Spring Top Collar Set. Steel – 1984–1999 Evo Big Twin; 1999–2004 Twin… OEM style replacement precision machined steel valve spring top...

Manley Valve Spring Top Collar Set. Titanium – 1936–1984 Big Twin OEM style replacement precision machined titanium valve spring top collars. Manle...

Manley Valve Spring Top Collar Set. Steel – 1936–1984 Big Twin OEM style replacement precision machined steel valve spring top collars. Note: Manle...

Manley Lower Valve Spring Collar Set. +.030" – 1980–1984 Shovelhead Low profile for +.030" spring travel. Chromoly; black oxided. Precision re-engi...

Manley Lower Valve Spring Collar Set – 1984–1999 Evo Big Twin; 1999–2004 Twin… Chromoly; black oxided. Precision re-engineered to offer installatio...