Engine (4)

Big Bore Piston — Bore 3.875", Oversize +0.005", Compression ratio 10.25:1

-€30.22

DRAG SPECIALTIES Big Bore Piston — Bore 3.875", Oversize +0.005", Compression...

Big bore piston for Twin Cam engines, precision-machined for durability and performance.

€85.40 €115.62

Big Bore Piston Kit — +0.010 in oversize, 4.250 in bore, 4.375 in stroke, 124 cu in displacement

-€149.95

S&S CYCLE Big Bore Piston Kit — +0.010 in oversize, 4.250 in bore, 4.375...

Complete piston kit with pistons, rings, wristpins, and clips. Compression ratios are approximate.

€326.56 €476.51

-€135.98

S&S CYCLE Piston Kit Big Bore 4.250" for M8 Models — 4.250" bore, 128 cu in

Forged aluminum piston kit engineered for durability and reliable engine performance. Ideal for rebuilds and upgrades.

€528.83 €664.81

Replacement Ring Set for S&S Pistons — Bore 3.4375", Piston +0.030"

-€14.81

S&S CYCLE Replacement Ring Set for S&S Pistons — Bore 3.4375", Piston...

Replacement ring set for S&S pistons. Includes rings for two pistons. Made in the USA.

€57.68 €72.49

Replacement Ring Set for S&S Pistons — 3.4375" bore, +0.050" pistons, domed head

-€14.27

S&S CYCLE Replacement Ring Set for S&S Pistons — 3.4375" bore, +0.050"...

Replacement ring sets for S&S pistons; sold as a set for two pistons. Made in the USA.

€45.03 €59.30

-€8.88

S&S CYCLE Replacement Ring Set for S&S Pistons — 3.625" bore, +0.040", Set

Replacement rings for S&S pistons. Includes rings for two pistons. Made in the U.S.A.

€28.01 €36.89

High-Performance Replacement Ring Set — 3.875" bore, +0.010" oversize, 95" displacement

-€10.69

WISECO High-Performance Replacement Ring Set — 3.875" bore, +0.010"...

Includes rings for one piston only.

Designed specifically for compatibility with Wiseco pistons.

€15.51 €26.20

$Replacement Piston Rings — 3.750\" bore, standard$

-€6.92

HASTINGS Replacement Piston Rings — 3.750\" bore, standard

Complete replacement set includes top and second compression rings plus three-piece oil control rings; restores sealing and oil control for two pistons.

€26.90 €33.82

-€5.67

HASTINGS Replacement Piston Rings — 3.750" bore, +0.010" oversize

Complete replacement piston ring set includes top and second compression rings plus three-piece oil control rings; restores compression, improves sealing and oil economy, and includes enough rings for two pistons. Made in the USA.

€22.06 €27.73

-€15.29

S&S CYCLE Replacement Ring Set for S&S Pistons — 3.927" bore, standard size

Replacement ring set for S&S pistons; includes rings for two pistons. Made in USA.

€59.47 €74.76

-€17.47

S&S CYCLE Replacement Ring Set for S&S Pistons — 4.125" bore, flat top

Replacement ring set for S&S pistons; includes rings for two pistons. Made in the USA.

€67.97 €85.44

-€8.32

HASTINGS Replacement Piston Rings — Bore oversize +0.020"

Includes top and second compression rings plus three-piece oil control rings; enough rings for two pistons.

€32.36 €40.68

-€34.97

S&S CYCLE Ring Set — Piston, 2-pack

Complete set of piston rings for reliable sealing and engine performance.

€135.99 €170.96

-€4.90

HASTINGS Replacement Piston Rings — HASTINGS, Set

Complete set of top, second, and three-piece oil control rings for two pistons. Barrel face top rings and Napier second rings provide improved sealing and heat transfer; three-piece Flex Vent oil rings ensure positive oil control. Made in the USA.

€19.06 €23.96

-€4.96

HASTINGS Replacement Piston Rings — 3.498" bore, +0.040" oversize

Complete set of top, second, and oil control rings for two pistons. Barrel face top rings, reverse torsional second rings, and three-piece oil control rails. Made in USA.

€19.26 €24.22

-€4.45

HASTINGS Replacement Piston Rings — 3.000" bore, moly-coated

Complete set including top, second, and three-piece oil control rings; barrel-face top rings and Napier second rings. Includes enough rings for two pistons.

€17.28 €21.73

Replacement Piston Rings — 3.937" bore, 107 cu in displacement, Standard piston size

-€8.18

HASTINGS Replacement Piston Rings — 3.937" bore, 107 cu in...

Complete replacement ring set for two pistons with PVD coating and three-piece oil control rings.

€31.78 €39.96

Replacement Piston Rings — Piston size +0.005", bore 3.937", displacement 107"

-€14.17

HASTINGS Replacement Piston Rings — Piston size +0.005", bore 3.937",...

Complete replacement ring set for two pistons, including barrel‑face top rings, Napier second rings, and three‑piece oil control rings for improved sealing and oil economy.

€55.10 €69.27

Replacement Piston Rings — Bore 3.937", Piston +0.010", Displacement 107"

-€13.81

HASTINGS Replacement Piston Rings — Bore 3.937", Piston +0.010",...

Complete replacement piston ring set for two pistons; includes PVD-coated barrel-face top rings, Napier second rings, and three-piece oil control rings. Made in the USA.

€53.73 €67.54

Replacement Piston Rings — 4.000" bore, Standard piston size, 114" displacement

-€10.61

HASTINGS Replacement Piston Rings — 4.000" bore, Standard piston size,...

Complete replacement set with top, second, and three-piece oil control rings; PVD coating on top rings; includes rings for two pistons.

€41.24 €51.85

Replacement Piston Rings — Piston size +0.005", Bore 4.000", Displacement 114"

-€12.73

HASTINGS Replacement Piston Rings — Piston size +0.005", Bore 4.000",...

Complete replacement set with PVD-coated barrel face top rings, Napier second rings, and three-piece oil control for improved sealing and oil economy.

€49.51 €62.24

-€14.66

HASTINGS Replacement Piston Rings — +0.010" piston, 4.000" bore, 114 cu in

Complete set of top and second compression rings plus three‑piece oil control rings for two pistons; PVD coated and made in the USA.

€57.01 €71.67

-€1.49

EASTERN MOTORCYCLE PARTS Piston Pin Clips — 10-pack, A-22097-99

Direct-fit piston pin clips for many Harley models. Made in the USA and built to OEM-equivalent standards.

€4.22 €5.71

-€1.41

S&S CYCLE Wrist Pin Circlips — Piston, 4 Pack

Durable retaining rings for wrist-pin applications; precision-formed for reliable fit and service life.

€5.50 €6.91

-€84.67

FEULING OIL PUMP CORP. High Flow Camplate — 7075 billet aluminum, gear drive

The High Flow Camplate increases oil flow and cooling, is pressure tested with a 55-60 psi relief setting, includes bearing and retainer plate hardware, and is for use with Feuling® oil pumps only.

€329.27 €413.94

-€34.97

S&S CYCLE Crankcase Breather Reed Valve — Standard thread size, silver

New-style reed valve that opens on demand to improve performance and prevent high-rpm oil carryover. Fast, simple installation. Made in the USA.

€135.99 €170.96

-€37.15

S&S CYCLE Crankcase Breather Reed Valve — +0.030" thread, Silver

Reed-style breather valve that opens on demand to reduce oil carryover and simplify installation.

€144.49 €181.64

Super Stock® Alternator Style Engine Case — 3.5" bore, fits up to 5" stroke, Black powder-coated

-€395.04

S&S CYCLE Super Stock® Alternator Style Engine Case — 3.5" bore, fits up...

3.5" stock bore alternator-style engine case; fits up to 5" stroke. Machined for EFI and includes complete hardware kit. Made in the USA.

€1,536.27 €1,931.31

-€60.02

TRASK Mystfree Kit — Crankcase breather valve, 6061 T6 aluminum

Improves crankcase ventilation; helps oil drain into the rocker and reduces breather misting. Precision-machined billet aluminum; simple bolt-on installation.

€233.41 €293.43

-€8.08

EASTERN MOTORCYCLE PARTS Dowel Pins — 0.434" x 0.500" L, 10 pack

Replacement dowel pins for precise alignment and secure assembly.

€22.84 €30.92

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