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Dyna – Engine & Gaskets

Browse engine & gaskets selected for Harley-Davidson Dyna motorcycles. Available items span engine components and gaskets, seals and service parts, helping you compare parts intended for different jobs. Confirm model coverage, key measurements and any supporting parts required on the individual listing.

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£23.98
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Gardner-Westcott XL Side Cover Mount Kit, SS Allen – 1986–1990 XL Sportster

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Gardner-Westcott XL Side Cover Mount Kit, SS Allen – 1986–1990 XL Sportster XL side cover mount kit, ss allen Fitment 86-90 XL Sportster (NU) Produ...

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£13.30
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£11.47
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£11.47

Gardner-Westcott Panhead Rocker Cover Screw Kit. SS Allen. Long – 1948–1965 Panhead

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Gardner-Westcott Panhead Rocker Cover Screw Kit. SS Allen. Long – 1948–1965 Panhead Stainless steel. Custom allenhead (socket head) bolt set. Used ...

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£85.65
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£84.46
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£84.46

MCS Sprocket Shaft Extension Only – L57-E74 XL Sportster

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MCS Sprocket Shaft Extension Only – L57-E74 XL Sportster Sprocket shaft extension only Fitment L57-E74 XL Sportster (NU) Product Details Brand: M...

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£85.65
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£84.46
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£84.46
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£51.56
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£51.56
£47.45
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£47.45

Gardner-Westcott XL Side Cover Mount Kit, Chrome Allen – 1957–1966 XLH; 1952–1956 K; KH

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Gardner-Westcott XL Side Cover Mount Kit, Chrome Allen – 1957–1966 XLH; 1952–1956 K; KH XL side cover mount kit, chrome allen Fitment 57-66 XLH; 52...

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£47.45
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£5.33
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£4.46
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£4.46

Gardner-Westcott Big Twin Cam Cover Mount Kit, SS Allen – 1970–1986 Big Twin

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Gardner-Westcott Big Twin Cam Cover Mount Kit, SS Allen – 1970–1986 Big Twin Big Twin cam cover mount kit, ss allen Fitment 70-86 Big Twin (NU) Pro...

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£5.33
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£5.33
£4.46
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£100.98
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£96.14
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£96.14

Gardner-Westcott Shovel Rocker Box Bolt Kit. Buttonhead, Chrome – 66-E81 Shovelhead

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Gardner-Westcott Shovel Rocker Box Bolt Kit. Buttonhead, Chrome – 66-E81 Shovelhead Chrome buttonhead bolts. Requires the removal of the OEM studs ...

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£96.14
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£96.14
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£409.61
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£409.61
£403.92
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£403.92

Gardner-Westcott Head Bolt & Cyl. Stud Kit, 12-Point – 1986 XL Sportster

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Gardner-Westcott Head Bolt & Cyl. Stud Kit, 12-Point – 1986 XL Sportster Head bolt & cyl. stud kit, 12-point Fitment 1986 XL Sportster Prod...

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£403.92
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£119.53
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£119.53
£117.87
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£117.87

Gardner-Westcott Head Bolt Kit, Acorn – L1973–1985 XL Sportster

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Gardner-Westcott Head Bolt Kit, Acorn – L1973–1985 XL Sportster Head bolt kit, acorn Fitment L73-85 XL Sportster (NU) Product Details Brand: Gard...

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£117.87
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£117.87
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£28.14
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£28.14
£25.90
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£25.90

Gardner-Westcott Rocker Shaft End Plug Set. Acorn Style. Chrome – 1971–1984 Shovelhead; 1971–1985 XL…

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Gardner-Westcott Rocker Shaft End Plug Set. Acorn Style. Chrome – 1971–1984 Shovelhead; 1971–1985 XL… Chrome plated. Custom Acorn styled. Complete ...

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£25.90
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£25.90
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£130.09
£130.09 - £130.09
£130.09
£128.28
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£128.28

Gardner-Westcott Head Bolt Kit, Studs with Acorn Nuts – 1948–1984 Big Twin

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Gardner-Westcott Head Bolt Kit, Studs with Acorn Nuts – 1948–1984 Big Twin Incl. washers Fitment 48-84 Big Twin (NU) Product Details Brand: Gardn...

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£130.09
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£128.28
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£128.28
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£93.02
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£93.02
£88.56
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£88.56

Gardner-Westcott Crankcase Bolt Kit, Allen – 1996–1999 Big Twin

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Gardner-Westcott Crankcase Bolt Kit, Allen – 1996–1999 Big Twin Mounts crankcase halves together. Kits come complete with washers; studs and nuts w...

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£93.02
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£88.56
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£88.56
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£19.14
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£19.14
£17.05
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£17.05

Gardner-Westcott Oil Pump Mount Kit, Allen – L1971–1976 XL Sportster

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Gardner-Westcott Oil Pump Mount Kit, Allen – L1971–1976 XL Sportster Oil pump mount kit, allen Fitment L71-76 XL Sportster (NU) Product Details B...

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£17.05
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£97.98
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£97.98
£93.28
£93.28 - £93.28
£93.28

Gardner-Westcott Sportster Rocker Box Bolt Kit. Acorn, Chrome – 1957–1976 XL Sportster

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Gardner-Westcott Sportster Rocker Box Bolt Kit. Acorn, Chrome – 1957–1976 XL Sportster Wtih custom style acorn bolts. Complete rocker box mounting ...

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£93.28
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£93.28
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£27.62
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£27.62
£25.42
£25.42 - £25.42
£25.42

Gardner-Westcott Oil Pump & Crankcase Plug Set, Allen – 1952–1965 Big Twin 2 Plug Set

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Gardner-Westcott Oil Pump & Crankcase Plug Set, Allen – 1952–1965 Big Twin 2 Plug Set Oil pump & crankcase plug set, allen Fitment 52-65 Bi...

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£25.42
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£26.54
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£26.54
£24.42
£24.42 - £24.42
£24.42

Gardner-Westcott Oil Pump & Crankcase Plug Set, Allen – 1966–1967 Big Twin 2 Plug Set

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Gardner-Westcott Oil Pump & Crankcase Plug Set, Allen – 1966–1967 Big Twin 2 Plug Set Oil pump & crankcase plug set, allen Fitment 66-67 Bi...

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£26.54
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£24.42
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£24.42
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£52.85
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£52.85
£48.64
£48.64 - £48.64
£48.64

Gardner-Westcott Oil Pump & Crankcase Plug Set, Allen – 1968–1969 Big Twin 3 Plug Set

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Gardner-Westcott Oil Pump & Crankcase Plug Set, Allen – 1968–1969 Big Twin 3 Plug Set Oil pump & crankcase plug set, allen Fitment 68-69 Bi...

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£48.64
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£13.83
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£13.83
£12.31
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£12.31

Gardner-Westcott Plug Allen, Oil Pump Check Valve – 1936–1980 Big Twin

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Gardner-Westcott Plug Allen, Oil Pump Check Valve – 1936–1980 Big Twin Chrome Fitment 36-80 Big Twin (NU) Product Details Brand: Gardner-Westcott...

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£12.31
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£15.28
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£15.28
£13.61
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£13.61

Gardner-Westcott Allen Plug Oil Screen Crankcase – 1952–1965 Big Twin

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Gardner-Westcott Allen Plug Oil Screen Crankcase – 1952–1965 Big Twin Chrome allenhead (socket head) plug. Fitment 52-65 Big Twin (NU) Product Deta...

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£13.61
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£13.61
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£73.83
£73.83 - £73.83
£73.83
£70.30
£70.30 - £70.30
£70.30

Gardner-Westcott Rocker Box Top Bolt Kit. Chrome Low Crown Acorn – 1984–1999 Big Twin; 1986–2022 XL…

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Gardner-Westcott Rocker Box Top Bolt Kit. Chrome Low Crown Acorn – 1984–1999 Big Twin; 1986–2022 XL… Chrome plated. With low crown acorn nut bolts....

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£73.83
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£70.30
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£70.30
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£90.29
£90.29 - £90.29
£90.29
£85.97
£85.97 - £85.97
£85.97

Gardner-Westcott Head Bolt Kit, 12-Point – 57-E73 XL Sportster

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Gardner-Westcott Head Bolt Kit, 12-Point – 57-E73 XL Sportster Chrome; 900cc models; incl. washers Fitment 57-E73 XL Sportster (NU) Product Details...

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£85.97
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£77.69
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£77.69
£73.97
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£73.97

Gardner-Westcott Head Bolt Kit, Allen – L1973–1985 XL Sportster

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Gardner-Westcott Head Bolt Kit, Allen – L1973–1985 XL Sportster Head bolt kit, allen Fitment L73-85 XL Sportster (NU) Product Details Brand: Gard...

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£73.97
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£57.41
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£57.41
£52.83
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£52.83

Gardner-Westcott Shovel Rocker Box Top Nut Kit. Chrome, Low Crown Acorn – 1966–1984 Shovel

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Gardner-Westcott Shovel Rocker Box Top Nut Kit. Chrome, Low Crown Acorn – 1966–1984 Shovel Chrome. Custom low crown Acorn nuts and washers. Easily ...

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£52.83
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£27.99
£27.99 - £27.99
£27.99
£25.76
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£25.76

Gardner-Westcott Crankcase Bolt Kit, Allen – 1991–2003 XL Sportster

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Gardner-Westcott Crankcase Bolt Kit, Allen – 1991–2003 XL Sportster Mounts crankcase halves together. Kits come complete with washers; studs and nu...

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£27.99
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£25.76
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£25.76
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£48.03
£48.03 - £48.03
£48.03
£44.20
£44.20 - £44.20
£44.20

Gardner-Westcott Shovel Rocker Box Bolt Kit. Allen, Chrome – L1981–1984 Shovelhead

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Gardner-Westcott Shovel Rocker Box Bolt Kit. Allen, Chrome – L1981–1984 Shovelhead Chrome allenhead (socket head) bolts. Requires the removal of th...

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£48.03
£44.20
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£44.20
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