Internal Parts

Replacement Piston — 3.760" diameter, +0.010" oversize, 4-3/8" stroke, kit

-€23.55

DRAG SPECIALTIES Replacement Piston — 3.760" diameter, +0.010" oversize, 4-3/8"...

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

€66.56 €90.11

-€26.33

DRAG SPECIALTIES Replacement Piston — 3.875" diameter, 4-3/8" stroke, kit

OEM-quality piston kit includes two pistons, wrist pins and clips. Economical replacement with proven performance.

€74.41 €100.74

-€26.33

DRAG SPECIALTIES Replacement Piston — 3.875" diameter, 4-3/8" stroke, +0.005"

OEM-quality cast aluminum alloy pistons; kits include two pistons, wrist pins and clips. Accepts OEM or Hastings rings (sold separately).

€74.41 €100.74

-€29.38

DRAG SPECIALTIES Piston — 3.750" bore, +0.020" oversize

OEM-quality piston kit for Twin Cam motors. Includes two pistons, wrist pins and clips. Accepts OEM or Hastings rings.

€83.05 €112.43

-€32.37

DRAG SPECIALTIES Big Bore Piston — Bore 3.875" , Compression 10.25:1

Big Bore piston for Twin Cam engines — precision-machined for dependable performance and straightforward installation.

€91.45 €123.82

Big Bore Piston — 3.875" bore, +0.005" oversize, 10.25:1 compression

-€30.22

DRAG SPECIALTIES Big Bore Piston — 3.875" bore, +0.005" oversize, 10.25:1...

Precision big bore piston for Twin Cam engines — ideal for rebuilds and performance builds.

€85.40 €115.62

-€121.41

DRAG SPECIALTIES Connecting Rod Set — Heavy Duty, Steel

Reinforced replacements that meet or exceed OEM specs. Pre-assembled set with two-hole crankpin, retainers, bearings and nuts. Verify rod-to-flywheel clearance.

€343.11 €464.52

-€82.49

DRAG SPECIALTIES Connecting Rod Assembly — 24281-74A-BXLB1Z

Durable, OEM-compliant replacement that ships fitted and ready to install; complete kit with crankpin, retainers, bearings and nuts.

€233.13 €315.62

-€84.14

DRAG SPECIALTIES Connecting Rod Assembly — 24281-83-BX-LB1Z

Heavy-duty replacement that meets or exceeds OEM specs. Complete set fitted and ready to install; includes two-hole crankpin, aluminum retainers, bearings, nuts and forged heat-treated rods.

€237.78 €321.92

-€3.43

DRAG SPECIALTIES Rocker Shaft Adjuster Kit — Front, Rear, Exhaust, Intake

Complete set of shims, spacers and seals to rebuild the four rocker shafts in '66–'84 Shovelhead engines; replace with each valve job.

€9.69 €13.12

-€0.77

DRAG SPECIALTIES Rocker Shaft Seals — 4 Pack, 1966–1984 Shovelhead

Complete seal set with shims and spacers to rebuild all four rocker arm shafts on 1966–1984 Shovelhead engines. Replace with each valve job.

€2.18 €2.95

-€4.63

DRAG SPECIALTIES Rocker Arm Shaft — Front, Rear

Rocker arm shaft for Harley-Davidson models — durable construction and precision operation.

€13.09 €17.72

-€98.73

JIMS Rocker Arm Shaft Kit — PN 5837

Performance rocker arm shafts and precision hardware machined from low-alloy case-hardened steel; hardware flats held to a .0005” parallel tolerance.

€172.78 €271.51

-€28.72

DRAG SPECIALTIES Pushrod Tube Kit — Black, 77334B

Complete kit with upper and lower tubes, clips, cups, springs and washers. O-rings and corks sold separately. One kit fits a complete engine.

€81.16 €109.88

-€42.27

JIMS Powerglide II Hydraulic Tappets — Standard, 0.842 in

Extensively developed hydraulic tappets featuring a billet body, increased roller width, hand-honed hydraulic cavity, over 30% higher dynamic load capacity, and improved lubrication for longer life. Made in the U.S.A.

€164.39 €206.66

-€40.73

JIMS Hydrosolid Tappets — 0.8420 in, Part No. 1820

Performs as a hydraulic tappet up to 5,500 rpm, then converts to solid for an estimated 3–6 usable hp; prevents hydraulic pump and requires adjustable pushrods. Made in the U.S.A.

€158.41 €199.14

Powerglide™ Steady Roll Tappets — 0.8420" diameter, hydraulic, standard

-€33.39

JIMS Powerglide™ Steady Roll Tappets — 0.8420" diameter, hydraulic,...

Powerglide™ Steady Roll Tappets: billet steel body, hand‑honed hydraulic cavity, bronze Steady Roll bushing for increased load capacity, lubrication and life.

€129.84 €163.23

Powerglide™ Steady Roll Tappets — Oversize (+0.002 in), 0.8440 in diameter, Hydraulic

-€37.86

JIMS Powerglide™ Steady Roll Tappets — Oversize (+0.002 in), 0.8440...

Powerglide™ Steady Roll tappets with a Steady Roll bronze bushing, billet steel body and enhanced lubrication for longer service life.

€91.71 €129.57

Replacement Cylinder for Evolution Motors — 3.500" bore, 1340 cc, Black

-€85.68

DRAG SPECIALTIES Replacement Cylinder for Evolution Motors — 3.500" bore, 1340...

Direct-fit replacement cylinders with ductile cast-iron sleeves in aluminum castings; finish-honed for precise piston fit.

€242.15 €327.83

-€129.35

JIMS Flow Pro 1 Billet Oil Pump Body — Flow Pro 1, black

CNC-machined pump body with matched feed and return gears increases oil return and reduces drag. Includes body, gears, shaft and plugs; cover and mounting hardware not included.

€503.06 €632.41

-€36.40

DRAG SPECIALTIES High Performance Oil Pump — High volume, Steel

Improves oil pressure and volume, reduces oil carryover at high rpm, 53mm rotors, die-cast aluminum body with high-strength steel gears. Fits stock and aftermarket cam support plates; not compatible with Screaming Eagle cam plate.