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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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£518.38 - £518.38
£518.38
£540.30
£540.30 - £540.30
£540.30

S&S 3.927" Bore Forged Piston & Ring Kit. Std – 2006–2017 96" Dyna; 2007–2017 96"…

Low stock

Description Replacement for 915299 & 915305 96" to 106" big bore conversion kits. Fitment 06-17 96" Dyna; 07-17 96" Softail; 07-16 96" FLT/Tour...

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£518.38 - £518.38
£518.38
£540.30
£540.30 - £540.30
£540.30
£518.38 - £518.38
£518.38
£540.30
£540.30 - £540.30
£540.30

S&S 3.927" Big Bore Conversion Piston & Ring Kit. Std – 1999–2005 88" Dyna; 1999–2006 88"…

Low stock

Description Fits 531704 and 531705 88" to 97" big bore conversion kits. 1.270" deck height. For OEM 4" stroke. Fitment 99-05 88" Dyna; 99-06 88" FL...

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£518.38 - £518.38
£518.38
£540.30
£540.30 - £540.30
£540.30
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£523.57
£523.57 - £523.57
£523.57
£452.46
£452.46 - £452.46
£452.46

S&S 3.927" Big Bore Conversion Piston & Ring Kit. +.010" – 1999–2005 88" Dyna; 1999–2006 88"…

Low stock

Description Fits 531704 and 531705 88" to 97" big bore conversion kits. 1.270" deck height. For OEM 4" stroke. Fitment 99-05 88" Dyna; 99-06 88" FL...

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£523.57
£523.57 - £523.57
£523.57
£452.46
£452.46 - £452.46
£452.46
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£23.30
£23.30 - £23.30
£23.30
£21.97
£21.97 - £21.97
£21.97

S&S Gasket Lower Rocker Cover – 1999–2017 Twin Cam

Low stock

Description Fiber reinforced paper. 1-piece left/right gasket. 2 used on one engine. OEM replacement reference 16719-99; 16719-99A Fitment 99-17 Tw...

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£23.30
£23.30 - £23.30
£23.30
£21.97
£21.97 - £21.97
£21.97
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£20.39
£20.39 - £20.39
£20.39
£18.84
£18.84 - £18.84
£18.84

S&S Gasket Rocker Cover. Upper – 1999–2017 Twin Cam

Low stock

Description .020" RCS. Rubber coated embossed steel. OEM replacement reference 17386-99; 17386-99A Fitment 99-17 Twin Cam (NU) Product Details Br...

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£20.39
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£20.39
£18.84
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£18.84
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£9.14
£9.14 - £9.14
£9.14
£8.44
£8.44 - £8.44
£8.44

S&S Gaskets Breather Cover – 1999–2010 Twin Cam

Low stock

Description OEM replacement reference 17591-99 Fitment 99-10 Twin Cam (NU) Product Details Brand: S&S Category: GASKETS > ROCKER COVERS G...

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£9.14
£9.14 - £9.14
£9.14
£8.44
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£8.44
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£9.14
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£9.14
£8.44
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£8.44

S&S Gasket Breather Baffle – 1999–2010 Twin Cam

Low stock

Description 2 used. OEM replacement reference 17592-99 Fitment 99-10 Twin Cam (NU) Product Details Brand: S&S Category: GASKETS > ROCKER ...

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£9.14
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£9.14
£8.44
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£8.44
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£45.56
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£45.56
£42.96
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£42.96

S&S Cylinder Head Gasket. 3-7/8" Bore .030" Mls – 1999–2017 Twin Cam with 3-7/8" Bore

Low stock

Description .030" Multi-Layered Steel. Fits 88" models that are converted to 95"/1550cc big bore and standard 103" H-D CVO models. Fitment 99-17 Tw...

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£45.56
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£45.56
£42.96
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£42.96
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£10.70
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£10.70
£9.88
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£9.88

S&S Cylinder Base O-Ring. Fr/Rr – 1999–2017 88" Up to 103" Twin Cam

Low stock

Description Front & rear. All 3-3/4" (88"/96") & 3-7/8" (95"/103") bore applications. Viton. OEM replacement reference 11256. Fitment 99-17...

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£10.70
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£10.70
£9.88
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£9.88
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£12.68
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£12.68
£11.71
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£11.71

S&S O-Ring, Twin Cam Cyl. Base 4 inch Bore – 1999–2017 Twin Cam with 4" S&S Ssw and…

Low stock

Description .103" Viton Fitment 99-17 Twin Cam with 4" S&S SSW and all stock 4" bore 110" models Product Details Brand: S&S Category: GA...

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£12.68
£12.68 - £12.68
£12.68
£11.71
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£11.71
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£4.34 - £4.34
£4.34
£5.77
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£5.77

S&S Cylinder Head / Base. Viton Rubber – 1999–2003 Twin Cam (Cyl. Head)…

Low stock

Description Heat resistant rubber. Cylinder head (with .062" thick gaskets) 4 used. Cylinder base 2 used. OEM replacement reference 11273. Note: So...

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£4.34 - £4.34
£4.34
£5.77
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£5.77
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£1,731.07
£1,785.45
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£1,785.45

99-06 4" Stroke Flywheel Assembly – 1999–2006 Twin Cam

Low stock

Description Standard 4" stroke. Note: Engines with strokes exceeding 4" may require S&S piston oiling jets and piston to jet clearance notches ...

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£1,731.07 - £1,731.07
£1,731.07
£1,785.45
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£1,785.45
Sold out
£550.53
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£550.53
£480.60
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£480.60

S&S 88" to 95" Big Bore Pop-Up Piston Kit. Std – 1999–2006 88" Twin Cam

Out of stock

Description Fits 99-06 Twin Cam as a 88" to 95" big bore conversion. Stock cylinders must be bored to 3-7/8" big bore; other modifications not requ...

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£550.53
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£550.53
£480.60
£480.60 - £480.60
£480.60
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£550.53
£573.89
£573.89 - £573.89
£573.89

S&S Twin Cam 106" Big Bore Piston Kit. Std – 1999–2006 88" Twin Cam with 4-1/2"…

Low stock

Description Fits 99-06 88" Twin Cam with stock cylinders that have been bored to 3-7/8"; and equipped with 4-1/2" stroker flywheels. Gives 9.7:1CR ...

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£550.53 - £550.53
£550.53
£573.89
£573.89 - £573.89
£573.89
Sold out
£550.53
£550.53 - £550.53
£550.53
£480.60
£480.60 - £480.60
£480.60

S&S Twin Cam 106" Big Bore Piston Kit. +.010" – 1999–2006 88" Twin Cam with 4-1/2"…

Out of stock

Description Fits 99-06 88" Twin Cam with stock cylinders that have been bored to 3-7/8"; and equipped with 4-1/2" stroker flywheels. Gives 9.7:1CR ...

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£550.53
£550.53 - £550.53
£550.53
£480.60
£480.60 - £480.60
£480.60
Sold out
Sold out
£485.19 - £485.19
£485.19
£505.67
£505.67 - £505.67
£505.67

S&S 96" to 103" Big Bore Pop-Up Piston Kit. Std – 2007–2017 96" Twin Cam

Out of stock

Description Fits 07-17 96" Twin Cam models as a 96" to 103" conversion. Compatible with stock 4-3/8" 96" stroke. Stock cylinders must be bored to 3...

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£485.19 - £485.19
£485.19
£505.67
£505.67 - £505.67
£505.67
Sold out
£485.19 - £485.19
£485.19
£505.67
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£505.67

S&S 96" to 103" Big Bore Pop-Up Piston Kit. +.005" – 2007–2017 96" Twin Cam

Low stock

Description Fits 07-17 96" Twin Cam models as a 96" to 103" conversion. Compatible with stock 4-3/8" 96" stroke. Stock cylinders must be bored to 3...

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£485.19 - £485.19
£485.19
£505.67
£505.67 - £505.67
£505.67
Sold out
£485.19 - £485.19
£485.19
£505.67
£505.67 - £505.67
£505.67

S&S 96" to 103" Big Bore Pop-Up Piston Kit. +.010" – 2007–2017 96" Twin Cam

Out of stock

Description Fits 07-17 96" Twin Cam models as a 96" to 103" conversion. Compatible with stock 4-3/8" 96" stroke. Stock cylinders must be bored to 3...

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£485.19 - £485.19
£485.19
£505.67
£505.67 - £505.67
£505.67
Sold out
Sold out
£518.38 - £518.38
£518.38
£540.30
£540.30 - £540.30
£540.30

S&S 3.927" Bore Forged Piston & Ring Kit. +.010" – 2006–2017 96" Dyna; 2007–2017 96"…

Out of stock

Description Replacement for 915299 & 915305 96" to 106" big bore conversion kits. Fitment 06-17 96" Dyna; 07-17 96" Softail; 07-16 96" FLT/Tour...

View full details
£518.38 - £518.38
£518.38
£540.30
£540.30 - £540.30
£540.30
Sold out
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£41.48
£41.48 - £41.48
£41.48
£39.30
£39.30 - £39.30
£39.30

S&S Master Rebuild Kit – 1992–1999 Big Twin with S&S Cast or…

Low stock

Description Compatible with S&S standard cast or billet oil pumps only. Includes paper gaskets; seals; retaining rings; woodruff keys; springs ...

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£41.48
£41.48 - £41.48
£41.48
£39.30
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£39.30
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£19.02 - £19.02
£19.02
£20.61
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£20.61

S&S Gasket Rebuild Kit – 1936–1991 Big Twin with S&S Cast or…

In stock

Description Compatible with S&S standard cast or billet oil pumps only. Includes paper gaskets; retaining ring and woodruff key. Fitment 36-91 ...

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£19.02 - £19.02
£19.02
£20.61
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£20.61
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£276.86
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£276.86
£235.09
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£235.09

S&S Precision Hydraulic Tappet Set – 1999–2017 Twin Cam; 2017–2026 M8…

Low stock

Description Complete drop-in set for one engine. Each individual USA made S&S Precision lifter is hand assembled to exact tolerances. Designed ...

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£276.86
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£276.86
£235.09
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£235.09
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£78.66
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£78.66
£77.34
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£77.34

Andrews Cam Drive Gear 17t – 1999–2006 Twin Cam

Low stock

Description OEM style replacement. Drive gear on the crankshaft. OEM replacement reference 25609-99 Fitment 99-06 Twin Cam (Excl. 2006 Dyna) (NU) P...

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£78.66
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£78.66
£77.34
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£77.34
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£5.38
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£5.38
£5.14
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£5.14

MCS Roll Pin, Oil Pump – 1984–1999 Big Twin

Low stock

Description 3/32" x 9/16" long Fitment 84-99 Big Twin (Excl. TC) Product Details Brand: MCS Category: MOTOR PARTS > OIL PUMP PARTS Unit: 25 ...

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£5.38
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£5.38
£5.14
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£5.14
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