Engine (6)

Big Bore Piston — 3.875" bore, +0.020" oversize, 10.25:1 compression

-€33.18
Out of Stock

DRAG SPECIALTIES Big Bore Piston — 3.875" bore, +0.020" oversize, 10.25:1...

High-quality Big Bore piston designed for Twin Cam engines to enhance power and durability.

€93.74 €126.92

-€51.63
Out of Stock

S&S CYCLE H-Grind Camshaft — H grind, for 74" and 80" Big Twin engines

OEM-spec hydraulic camshaft reproducing stock cams used in '48–'84 Big Twins; ideal for repair and restoration of 74" and 80" engines.

€200.80 €252.43

Piston Kit — 3.937" bore, 107" displacement, 10.0:1 compression ratio

-€34.31
Out of Stock

DRAG SPECIALTIES Piston Kit — 3.937" bore, 107" displacement, 10.0:1...

Coated pistons for reduced friction and cooler running. Ideal OEM replacement; includes two pistons, wrist pins and clips. Accepts OEM or Hastings rings (sold separately).

€96.97 €131.28

-€34.31
Out of Stock

DRAG SPECIALTIES Piston Kit — 3.937" bore, +0.005" oversize, 107" displacement

Coated piston kit for OEM replacement. Includes two pistons, wrist pins and clips. Accepts OEM or Hastings rings (sold separately).

€96.97 €131.28

-€34.31
Out of Stock

DRAG SPECIALTIES Piston Kit — 3.937" bore, 107" displacement

Coated pistons reduce friction and run cooler. Includes two pistons, wrist pins and clips. Ideal for OEM replacement; rings sold separately.

€96.97 €131.28

$Piston Kit — Bore 4.000\" , 114 cu in, 10.5:1$

-€34.31
Out of Stock

DRAG SPECIALTIES Piston Kit — Bore 4.000\" , 114 cu in, 10.5:1

Coated pistons reduce friction and run cooler; ideal OEM replacement. Includes two pistons, wrist pins and clips. Rings sold separately.

€96.97 €131.28

583G Gear Drive Camshaft Kit — 583 Series, Intake 203°/0.583", Exhaust 262°/0.583", Gear drive

-€213.10
Out of Stock

S&S CYCLE 583G Gear Drive Camshaft Kit — 583 Series, Intake 203°/0.583",...

Reverses rear cam rotation to increase cam lift capability and valve timing accuracy. Includes gears, bearings, gasket and instructions. Professional installation required.

€828.74 €1,041.84

$Piston Kit — Bore 4.000\", Displacement 114\", Compression 10.5:1$

-€34.31
Out of Stock

DRAG SPECIALTIES Piston Kit — Bore 4.000\", Displacement 114\", Compression 10.5:1

Coated pistons for longer life. OEM replacement kit includes two pistons, wrist pins and clips. Rings sold separately.

€96.97 €131.28

-€34.31
Out of Stock

DRAG SPECIALTIES Piston Kit — 4.000" bore, +0.010" oversize, 114 cu in

Coated pistons for extended life; OEM replacement kit with two pistons, wrist pins and clips. Accepts OEM or Hastings rings (sold separately).

€96.97 €131.28

-€32.03
Out of Stock

DRAG SPECIALTIES Replacement Piston Kit — 3.875" bore, 9.4:1 compression

Complete kit includes two pistons, wrist pins and clips. Accepts OEM or Hastings rings (sold separately). OEM-quality cast aluminum alloy construction.

€90.50 €122.53

-€32.03
Out of Stock

DRAG SPECIALTIES Replacement Piston Kit — 3.875" bore, +0.005" oversize

OEM-quality cast aluminum replacement piston kit; includes two pistons, wrist pins and clips. Accepts OEM or Hastings rings (sold separately). Economical and reliable.

€90.50 €122.53

Replacement Piston Kit — 3.875" bore, +0.010" oversize, 9.4:1 compression

-€32.03
Out of Stock

DRAG SPECIALTIES Replacement Piston Kit — 3.875" bore, +0.010" oversize, 9.4:1...

OEM-quality cast aluminum piston kit including two pistons, wrist pins and clips; accepts OEM or Hastings rings (sold separately).

€90.50 €122.53

Replacement Piston Kit — 3.875" bore, +0.020" oversize, 9.4:1 compression

-€32.03
Out of Stock

DRAG SPECIALTIES Replacement Piston Kit — 3.875" bore, +0.020" oversize, 9.4:1...

OEM-quality replacement piston kit includes two pistons, wrist pins and clips. Accepts OEM or Hastings rings (sold separately). Economical and reliable.

€90.50 €122.53

-€94.15
Out of Stock

FEULING OIL PUMP CORP. Reaper® 630 Cam — 630 Series grind, Exhaust 263°, Intake 258°

High‑performance cam that delivers strong mid and top end power while retaining low‑end usability. Requires carburetor/throttle body tuning, performance exhaust and intake, and upgraded valve train components. 2500–6900+ RPM.

€366.15 €460.30

-€112.20
Out of Stock

S&S CYCLE MR103 Easy Start Camshaft Kit — S&S Cycle, Chain

Bolt-in camshaft kit for 103" engines that eases starting by temporarily reducing compression, then returns to full compression. Improves midrange power (best 2500–5500 rpm). Includes camshafts and all necessary gaskets, bearings and hardware. Installer must verify coil bind and clearances.

€436.38 €548.58

-€23.26
Out of Stock

DRAG SPECIALTIES Piston Kit — Bore 3.000\", Compression 9.0:1

Complete piston kit includes two pistons, wrist pins and circlips; accepts OEM or Hastings rings (sold separately). Coated skirts reduce friction and extend piston life.

€65.73 €88.99

-€23.26
Out of Stock

DRAG SPECIALTIES Piston Kit — 3.000 in bore, +0.005 in oversize

Ideal for OEM replacement. Kit includes two pistons, wrist pins and circlips. Accepts OEM or Hastings rings (sold separately). Coated skirts reduce friction and extend piston life.

€65.73 €88.99

-€23.26
Out of Stock

DRAG SPECIALTIES Piston Kit — 3.000 in bore, +0.010 in oversize, 9.0:1 compression

Ideal for OEM replacement. Includes two pistons, wrist pins and circlips. Accepts OEM or Hastings rings (sold separately). Piston skirts have a coating to extend life and reduce friction.

€65.73 €88.99

-€86.79
Out of Stock

S&S CYCLE 635 H.O. Chain Drive Camshaft Kit — Grind 635HO, Raw finish

High lift camshaft kit for modified engines 106"+; not a bolt-in kit. Includes camshafts and hardware; installer must verify clearances.

€337.57 €424.36

-€30.51
Out of Stock

DRAG SPECIALTIES Piston Kit — 3.498\", 9.5:1

OEM-quality replacement kit with two pistons, wrist pins and circlips. Piston skirt coating reduces friction and extends service life.

€86.19 €116.70

-€30.51
Out of Stock

DRAG SPECIALTIES Piston Kit — 3.498" bore, +0.005" oversize

Kit includes two pistons, wrist pins and circlips; accepts OEM or Hastings rings (sold separately). Coated piston skirts reduce friction and extend life.

€86.19 €116.70

-€30.51
Out of Stock

DRAG SPECIALTIES Piston Kit — 3.498 in bore, +0.010 in oversize

Ideal for OEM replacement. Accepts OEM or Hastings rings (sold separately). Kit includes two pistons, wrist pins and circlips.

€86.19 €116.70

Replacement Ring Set for S&S Pistons — 3.500" bore, standard piston size

-€14.56
Out of Stock

S&S CYCLE Replacement Ring Set for S&S Pistons — 3.500" bore, standard...

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

€56.59 €71.15

-€13.43
Out of Stock

S&S CYCLE Replacement Ring Set for S&S Pistons — +0.020", 3.500"

Replacement ring set for S&S pistons. Sold as a set for two pistons. Made in the USA.

€52.24 €65.67

Replacement Ring Set for S&S Pistons — 3.4375 in bore, Standard piston size

-€14.56
Out of Stock

S&S CYCLE Replacement Ring Set for S&S Pistons — 3.4375 in bore,...

Replacement ring sets for S&S pistons sold as matched sets for two pistons. Made in the USA.

€56.59 €71.15

-€104.59
Out of Stock

FEULING OIL PUMP CORP. Reaper® 580 Cam — 0.580" lift, 268° exhaust / 258° intake

High-performance camshaft that shifts the powerband higher for more top-end horsepower. Requires high-lift springs, upgraded pushrods and lifters, plus high-flow intake and performance exhaust.

€406.75 €511.34

-€8.89
Out of Stock

EASTERN MOTORCYCLE PARTS Cam Drive Sprocket Spacers — 0.120" spacer, 5-pack

Precision sprocket spacers to restore chain alignment. Made in the U.S.A.

€25.11 €34.00

-€8.89
Out of Stock

EASTERN MOTORCYCLE PARTS Cam Drive Sprocket Spacers — 0.130", 5-pack

Precision spacers that improve drivetrain alignment and durability. Made in the U.S.A.

€25.11 €34.00

Replacement Ring Set for S&S Pistons — Bore 3.4375", Piston +0.060"

-€14.56
Out of Stock

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

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

€56.59 €71.15

-€8.89
Out of Stock

EASTERN MOTORCYCLE PARTS Cam Drive Sprocket Spacers — 0.140", 5-pack

Durable spacers for cam drive sprockets that maintain chain alignment and extend component life.

€25.11 €34.00

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