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Engine

8379 parts

Harley engine parts for Evo, Twin Cam, Milwaukee-Eight and Sportster motors. Jump to cams, big bore kits, heads, gaskets and seals or engine covers. Free US shipping over $100.

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    V-Twin - 11-1711 - Front Panhead Cylinder
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    V-Twin - 11-1711 - Front Panhead Cylinder

    Motorshop

    $207.90
    V-Twin - 11-1711 - Front Panhead CylinderDescriptionFront Panhead cylinder does not come with the piston.*NOTE: Oil feeds rockers from inside cylinder - use correct base gaskets to seal drain oil...
    $207.90
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    $207.90
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    V-Twin - 11-1704 - 80 inch Evolution Piston Kit .005 V-Twin - 11-1704 - 80 inch Evolution Piston Kit .005
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    V-Twin - 11-1704 - 80 inch Evolution Piston Kit .005

    Motorshop

    $161.59
    V-Twin - 11-1704 - 80 inch Evolution Piston Kit .005DescriptionReplacement 80" Evolution moly coated piston kit. Pistons are .005 oversize. The moly coating helps reduce friction and wear. This kit...
    $161.59
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    V-Twin - 11-1702 - 80 inch Evolution Piston Kit Standard V-Twin - 11-1702 - 80 inch Evolution Piston Kit Standard
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    V-Twin - 11-1702 - 80 inch Evolution Piston Kit Standard

    Motorshop

    $161.59
    V-Twin - 11-1702 - 80 inch Evolution Piston Kit StandardDescriptionReplacement 80" Evolution moly coated piston kit. Pistons are standard sized. The moly coating helps reduce friction and wear. This...
    $161.59
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    V-Twin - 11-1700 - 883cc to 1200cc Conversion Piston Set .005 Oversize V-Twin - 11-1700 - 883cc to 1200cc Conversion Piston Set .005 Oversize
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    V-Twin - 11-1700 - 883cc to 1200cc Conversion Piston Set .005 Oversize

    Motorshop

    $208.74
    V-Twin - 11-1700 - 883cc to 1200cc Conversion Piston Set .005 OversizeDescriptionMoly coated piston set includes rings, wrist pins and circlips. Reverse dome piston kit requires cylinder boring...
    $208.74
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    V-Twin - 11-1689 - 74 inch Knucklehead Front Cylinder - Fits 1941-1947 Harley-Davidson FL
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    V-Twin - 11-1689 - 74 inch Knucklehead Front Cylinder - Fits 1941-1947 Harley-Davidson FL

    V-Twin Mfg

    $249.48
    Front cylinder fits Knucklehead 1941-1947 74" models. Features MC cast factory markings.Bore size finished with .025 clearance. Fits:FL 1941-1947Additional Information
    $249.48
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    V-Twin - 11-1687 - Panhead Tappet Kit - Fits 1948-1952 Harley-Davidson EL, FL V-Twin - 11-1687 - Panhead Tappet Kit - Fits 1948-1952 Harley-Davidson EL, FL
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    V-Twin - 11-1687 - Panhead Tappet Kit - Fits 1948-1952 Harley-Davidson EL, FL

    V-Twin Mfg

    $463.57
    Panhead tappet kit includes alloy lifter bases, solid lifters and hydraulic pushrods. Fits:EL 1948-1952FL 1948-1952Additional Information UOM1 -
    $463.57
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    V-Twin - 11-1678 - M8 Lower Rocker Box Cover Screw Set
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    V-Twin - 11-1678 - M8 Lower Rocker Box Cover Screw Set

    V-Twin Mfg

    $43.66
    V-Twin - 11-1678 - M8 Lower Rocker Box Cover Screw SetDescription18 piece lower rocker box cover screw set features a stainless steel finish. For use on M8 models.Sold as an 18 piece set including...
    $43.66
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    V-Twin - 11-1676 - Evolution Knucklehead Rocker Box Cover - Fits 1985-1999 Harley-Davidson FLST, 1985-1998 FLT, 1985-1999 FXST
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    V-Twin - 11-1676 - Evolution Knucklehead Rocker Box Cover - Fits 1985-1999 Harley-Davidson FLST, 1985-1998 FLT, 1985-1999 FXST

    V-Twin Mfg

    $249.48
    Evolution Knucklehead rocker box cover fetures a raw finish and is one piece only for use on Knucklehead rocker box kit. Fits:FLST 1985-1999FLT 1985-1998FXST 1985-1999Additional Information
    $249.48
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    V-Twin - 11-1675 - Knucklehead Rocker Box Cover Only - Fits 1985-1999 Harley-Davidson FLST, 1985-1998 FLT, 1985-1999 FXST
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    V-Twin - 11-1675 - Knucklehead Rocker Box Cover Only - Fits 1985-1999 Harley-Davidson FLST, 1985-1998 FLT, 1985-1999 FXST

    V-Twin Mfg

    $232.77
    One piece rocker box cover features a raw finish and is for use on Knucklehead rocker box kits. Fits:FLST 1985-1999FLT 1985-1998FXST 1985-1999Additional Information
    $232.77
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    V-Twin - 11-1659 - M8 Shovelhead Rocker Box Cover Set
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    V-Twin - 11-1659 - M8 Shovelhead Rocker Box Cover Set

    V-Twin Mfg

    MSRP: $508.06
    $414.59
    V-Twin - 11-1659 - M8 Shovelhead Rocker Box Cover SetDescriptionShovelhead rocker box cover set features a raw natural cast finish and replaces stock covers. For use on M8 models.Offers imporved heat...
    MSRP: $508.06
    $414.59
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    MSRP: $508.06
    $414.59
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    V-Twin - 11-1635 - TC-88 Rocker Box Mount Kit Chrome - Fits 1999-2016 Harley-Davidson FLT, FLST, 1999-2017 FXST, FXD
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    V-Twin - 11-1635 - TC-88 Rocker Box Mount Kit Chrome - Fits 1999-2016 Harley-Davidson FLT, FLST, 1999-2017 FXST, FXD

    V-Twin Mfg

    $74.15
    Rocker box mount kit includes upper and lower rocker cover base and top screws in a chrome finish.Sold as a 36 piece kit. Fits:FLT 1999-2016FLST 1999-2016FXST 1999-2017FXD 1999-2017Additional...
    $74.15
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    $74.15
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    V-Twin - 11-1610 - M8 Complete Lower Rocker Box Cover Screw Set Zinc
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    V-Twin - 11-1610 - M8 Complete Lower Rocker Box Cover Screw Set Zinc

    V-Twin Mfg

    $44.44
    V-Twin - 11-1610 - M8 Complete Lower Rocker Box Cover Screw Set ZincDescriptionM8 complete lower rocker box cover screw set features a zinc finish.20 pieces screw set is for use on M8 models...
    $44.44
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    $44.44
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    V-Twin - 11-1609 - M8 Upper Rocker Box Mount Kit
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    V-Twin - 11-1609 - M8 Upper Rocker Box Mount Kit

    V-Twin Mfg

    $44.44
    V-Twin - 11-1609 - M8 Upper Rocker Box Mount KitDescriptionUpper rocker box mount kit for M8 models.. Fits:FLT 2017-UPFXST 2018-UPAdditional Information
    $44.44
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    V-Twin - 11-1580 - Evolution Rocker Cover Set
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    V-Twin - 11-1580 - Evolution Rocker Cover Set

    Motorshop

    $549.91
    V-Twin - 11-1580 - Evolution Rocker Cover SetDescriptionEvolution rocker cover set features a natural alloy finish with chrome hex nuts and chrome rocker cover tins. For Evolution Big Twin models and...
    $549.91
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    $549.91
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    V-Twin - 11-1577 - TC-88 Finned Rocker Box Set - Fits 1999-2016 Harley-Davidson FL, 1999-2017 FLST, FXST
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    V-Twin - 11-1577 - TC-88 Finned Rocker Box Set - Fits 1999-2016 Harley-Davidson FL, 1999-2017 FLST, FXST

    V-Twin Mfg

    $282.05
    TC-88 finned rocker box set features a black finish. Fits:FL 1999-2016FLST 1999-2017FXST 1999-2017Additional Information UOM1 - SET
    $282.05
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    $282.05
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    V-Twin - 11-1559 - 45 inch Valve Guide Set - Fits 1929-1931 Harley-Davidson DL
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    V-Twin - 11-1559 - 45 inch Valve Guide Set - Fits 1929-1931 Harley-Davidson DL

    V-Twin Mfg

    $290.20
    45" valve guide set is the long shoulder type and is the same guide intake and exhaust.Sold as a set of 4. Fits:DL 1929-1931Additional Information UOM<
    $290.20
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    $290.20
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    V-Twin - 11-1547 - 1936 Knucklehead Rocker Arm Set
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    V-Twin - 11-1547 - 1936 Knucklehead Rocker Arm Set

    V-Twin Mfg

    $776.16
    V-Twin - 11-1547 - 1936 Knucklehead Rocker Arm SetDescription1936 Knucklehead rocker arm set is nickel plated and is for use with exposed rocker arms on 1936-1937 EL models only.Buttons are...
    $776.16
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    $776.16
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    V-Twin - 11-1545 - 45 inch DL Intake Valve - Fits 1929-1931 Harley-Davidson DL
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    V-Twin - 11-1545 - 45 inch DL Intake Valve - Fits 1929-1931 Harley-Davidson DL

    V-Twin Mfg

    $54.96
    45" DL intake valve. Fits:DL 1929-1931Additional Information OEM No.163-29 UOM1 - EA <
    $54.96
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    $54.96
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    V-Twin - 11-1544 - 45 inch DL Exhaust Valve - Fits 1929-1931 Harley-Davidson DL
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    V-Twin - 11-1544 - 45 inch DL Exhaust Valve - Fits 1929-1931 Harley-Davidson DL

    V-Twin Mfg

    $54.96
    45" DL exhaust valve. Fits:DL 1929-1931Additional Information OEM No.165-29 UOM1 - EA
    $54.96
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    V-Twin - 11-1543 - Valve Keeper Pins
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    V-Twin - 11-1543 - Valve Keeper Pins

    Eastern Motorcycle Parts

    MSRP: $37.35
    $36.60
    V-Twin - 11-1543 - Valve Keeper PinsDescriptionValve keeper pins for use in slotted valves.Sold as a pack of 5. Fits:JD 1915-1929DL 1929-1935Additional Information
    MSRP: $37.35
    $36.60
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    MSRP: $37.35
    $36.60
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    V-Twin - 11-1449 - Evolution Knucklehead Rocker Box Cover Kit - Fits 1985-1999 Harley-Davidson FLST, 1985-1998 FLT, 1985-1999 FXST V-Twin - 11-1449 - Evolution Knucklehead Rocker Box Cover Kit - Fits 1985-1999 Harley-Davidson FLST, 1985-1998 FLT, 1985-1999 FXST
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    V-Twin - 11-1449 - Evolution Knucklehead Rocker Box Cover Kit - Fits 1985-1999 Harley-Davidson FLST, 1985-1998 FLT, 1985-1999 FXST

    V-Twin Mfg

    MSRP: $723.95
    $400.31
    Knucklehead Rocker box kit features a natural cast finish for Evolution models and offers additional cooling. Rocker box cover kit includes two covers, two knucklehead and four chrome hex knucklehead...
    MSRP: $723.95
    $400.31
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    MSRP: $723.95
    $400.31
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    V-Twin - 11-1435 - OE Pushrod Cover Spring Cup Set Black
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    V-Twin - 11-1435 - OE Pushrod Cover Spring Cup Set Black

    OE

    $53.35
    V-Twin - 11-1435 - OE Pushrod Cover Spring Cup Set BlackDescriptionOE pushrod cover spring cup set features a black finish.Sold as a set of 4. Requires the use of adjustable pushrods or removal of...
    $53.35
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    $53.35
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    V-Twin - 11-1434 - Evolution D-Ring Set - Fits 1984-1991 Harley-Davidson FLH, FLST
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    V-Twin - 11-1434 - Evolution D-Ring Set - Fits 1984-1991 Harley-Davidson FLH, FLST

    V-Twin Mfg

    $92.30
    Evolution rocker box cover d-ring set features an alloy natural finish.Sold as a pair. Fits:FLH 1984-1991FLST 1984-1991Additional Information UOM
    $92.30
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    $92.30
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    V-Twin - 11-1416 - 1270cc/1200cc Piston Kit - Fits 1986-2003 Harley-Davidson XL (1270cc, 1200cc)
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    V-Twin - 11-1416 - 1270cc/1200cc Piston Kit - Fits 1986-2003 Harley-Davidson XL (1270cc, 1200cc)

    V-Twin Mfg

    $290.79
    1270cc/1200cc piston kit with rings and wrist pins.**NOTE: Run engine at moderate speeds for at least 500 miles, avoiding excessive running in lower gears, in order to properly break-in new pistons...
    $290.79
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    $290.79
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    V-Twin - 11-1377 - 1000cc Piston Ring Set Standard V-Twin - 11-1377 - 1000cc Piston Ring Set Standard
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    V-Twin - 11-1377 - 1000cc Piston Ring Set Standard

    Hastings

    $108.34
    V-Twin - 11-1377 - 1000cc Piston Ring Set StandardDescriptionHastings moly piston ring set is for a 3-3/16" bore and is standard size. Features moly top compression rings with a size of 1/16" and oil...
    $108.34
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    $108.34
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    V-Twin - 11-1353 - 88 inch Twin Cam Moly Piston Ring Set .020 V-Twin - 11-1353 - 88 inch Twin Cam Moly Piston Ring Set .020
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    V-Twin - 11-1353 - 88 inch Twin Cam Moly Piston Ring Set .020

    Hastings

    $121.10
    V-Twin - 11-1353 - 88 inch Twin Cam Moly Piston Ring Set .020DescriptionHastings moly piston ring set is .020 oversize. Set includes a moly top compression ring and chrome oil rings.Sold as a pair...
    $121.10
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    $121.10
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    V-Twin - 11-1347 - 61 inch Overhead Valve 3-5/16 inch Piston Set .005 Oversize
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    V-Twin - 11-1347 - 61 inch Overhead Valve 3-5/16 inch Piston Set .005 Oversize

    Motorshop

    $285.96
    V-Twin - 11-1347 - 61 inch Overhead Valve 3-5/16 inch Piston Set .005 OversizeDescriptionPiston set with 3-5/16" bore is .005 oversized. Set includes hasting 3 piece ring set, 2 wrist pins, and 4...
    $285.96
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    $285.96
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    V-Twin - 11-1304 - 1270cc/883cc Piston Kit
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    V-Twin - 11-1304 - 1270cc/883cc Piston Kit

    V-Twin Mfg

    $237.50
    V-Twin - 11-1304 - 1270cc/883cc Piston KitDescription1270cc/883cc piston kit with rings.MC forged pistons have teflon coated tops to aid in a more complete combustion. Final cylinder is done with our...
    $237.50
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    $237.50
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    V-Twin - 11-1297 - Knucklehead Cylinder Head Set
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    V-Twin - 11-1297 - Knucklehead Cylinder Head Set

    Motorshop

    $3,853.31
    V-Twin - 11-1297 - Knucklehead Cylinder Head SetDescriptionKnucklehead cylinder head set features original cast iron construction with a black finish. Head set includes valves, springs, collars and...
    $3,853.31
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    $3,853.31
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    V-Twin - 11-1293 - 74 inch Panhead Cylinder Set V-Twin - 11-1293 - 74 inch Panhead Cylinder Set (2)
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    V-Twin - 11-1293 - 74 inch Panhead Cylinder Set

    Motorshop

    $379.30
    V-Twin - 11-1293 - 74 inch Panhead Cylinder SetDescriptionReplica set includes the front and rear cylinders with OE style casting number code.The cylinders are bored and honed to 3.438" inner...
    $379.30
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    $379.30
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    V-Twin - 11-1276 - Piston Kit .080 Oversize V-Twin - 11-1276 - Piston Kit .080 Oversize
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    V-Twin - 11-1276 - Piston Kit .080 Oversize

    Motorshop

    $207.80
    V-Twin - 11-1276 - Piston Kit .080 OversizeDescriptionKit includes .080 pistons, thick ring set, wrist pin and lock piston that features a steel expansion strut cast in.Pistons have a steel expansion...
    $207.80
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    $207.80
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    V-Twin - 11-1246 - M8 Lower Pushrod Cover Set Chrome
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    V-Twin - 11-1246 - M8 Lower Pushrod Cover Set Chrome

    V-Twin Mfg

    $56.91
    V-Twin - 11-1246 - M8 Lower Pushrod Cover Set ChromeDescriptionM8 lower pushrod cover set features a chrome finish.This lower pushrod cover set replaces OEM#25701000. Sold as a set of 4. Fits:FLST...
    $56.91
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    $56.91
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    V-Twin - 11-1245 - Lower Pushrod Cover Chrome - Fits 1979-1985 Harley-Davidson XL (Late 1979)
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    V-Twin - 11-1245 - Lower Pushrod Cover Chrome - Fits 1979-1985 Harley-Davidson XL (Late 1979)

    V-Twin Mfg

    $51.68
    2023 New Production chrome lower pushrod covers.Sold as a set of 4. Fits:XL 1979-1985 Late 1979Additional Information OEM No.17937-79
    $51.68
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    $51.68
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    V-Twin - 11-1237 - Billet Lower Pushrod Cover Set - Fits 1984-1999 Harley-Davidson FX, FL V-Twin - 11-1237 - Billet Lower Pushrod Cover Set - Fits 1984-1999 Harley-Davidson FX, FL
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    V-Twin - 11-1237 - Billet Lower Pushrod Cover Set - Fits 1984-1999 Harley-Davidson FX, FL

    V-Twin Mfg

    $112.44
    Billet lower pushrod cover set features a natural alloy finish. Set fits Evolution models.Sold as a four piece set. Fits:FX 1984-1999FL 1984-1999Additional Information
    $112.44
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    $112.44
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    V-Twin - 11-1235 - Sifton Billet Lower Pushrod Cover Set V-Twin - 11-1235 - Sifton Billet Lower Pushrod Cover Set
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    V-Twin - 11-1235 - Sifton Billet Lower Pushrod Cover Set

    Sifton

    $112.44
    V-Twin - 11-1235 - Sifton Billet Lower Pushrod Cover SetDescriptionSifton billet lower pushrod cover set features a natural alloy finish. Set fits Panhead and Shovelhead motors. Fits:FX 1948-1978FL...
    $112.44
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    $112.44
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    V-Twin - 11-1226 - M8 Bronze Valve Guide V-Twin - 11-1226 - M8 Bronze Valve Guide
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    V-Twin - 11-1226 - M8 Bronze Valve Guide

    Kibblewhite

    $35.46
    V-Twin - 11-1226 - M8 Bronze Valve GuideDescriptionBronze exhaust valve guide is for M8 models and is standard size. Fits:FLT 2016-UPAdditional Information <
    $35.46
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    $35.46
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    V-Twin - 11-1224 - M8 Cast Iron Intake Valve Guide V-Twin - 11-1224 - M8 Cast Iron Intake Valve Guide
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    V-Twin - 11-1224 - M8 Cast Iron Intake Valve Guide

    Kibblewhite

    MSRP: $13.86
    $13.72
    V-Twin - 11-1224 - M8 Cast Iron Intake Valve GuideDescriptionCast iron intake valve guide is for M8 models and is .001" oversize. Fits:FLT 2017-UPAdditional Information
    MSRP: $13.86
    $13.72
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    MSRP: $13.86
    $13.72
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    V-Twin - 11-1219 - M8 Black Diamond Exhaust Valve V-Twin - 11-1219 - M8 Black Diamond Exhaust Valve
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    V-Twin - 11-1219 - M8 Black Diamond Exhaust Valve

    Kibblewhite

    $46.15
    V-Twin - 11-1219 - M8 Black Diamond Exhaust ValveDescriptionBlack diamond exhaust valve is for M8 models and feature a standard head diameter. Fits:FLT 2017-UPAdditional Information
    $46.15
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    $46.15
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    V-Twin - 11-1210 - Solid Tappet Screw Set - Fits 1936-1952 Harley-Davidson EL
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    V-Twin - 11-1210 - Solid Tappet Screw Set - Fits 1936-1952 Harley-Davidson EL

    V-Twin Mfg

    $35.46
    Solid tappet screw set includes 4 screws with lock nut. Set is for solid puhsrods on Panhead, Knucklehead and Sportser. Fits:EL 1936-1940EL 1941-1952Additional Information
    $35.46
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    $35.46
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    V-Twin - 11-1157 - Knucklehead Rocker Arm Set - Fits 1940-1947 Harley-Davidson FL, 1938-1947 EL V-Twin - 11-1157 - Knucklehead Rocker Arm Set - Fits 1940-1947 Harley-Davidson FL, 1938-1947 EL
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    V-Twin - 11-1157 - Knucklehead Rocker Arm Set - Fits 1940-1947 Harley-Davidson FL, 1938-1947 EL

    V-Twin Mfg

    $639.57
    Machined Knucklehead rocker arm set.For use on the 1936-1937 valve spring cup and cap style covers, where the rocker arms will be exposed. The outer diameter of the rocker arm is turned down to .80"...
    $639.57
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    $639.57
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About Engine

 

Harley Engine Parts for Rebuilds and Performance

From a fresh gasket set to a full big bore build, we stock the Harley engine parts you need to rebuild, maintain or wake up your motor. Match parts to your engine: Evo, Twin Cam, Milwaukee-Eight and Sportster parts don't swap across.

Shop Engine Parts

We carry engine parts from S&S Cycle, Drag Specialties, V-Twin Mfg, Alloy Art, HardDrive and Rocker Lockers. Pair your build with an air cleaner and exhaust that let it breathe.

Not Sure It Fits?

Year, model and engine all matter, and plenty of parts look the same but aren't. If you can't tell whether something fits your bike, hit us up with your year and model and we'll check it before you order.