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Rotating Assemblies for Subaru



Manley offers full rotating assembly kits for Subaru EJ205/EJ207/EJ255/EJ257 engines. Each kit comes with billet crankshaft, forged pistons, forged connecting rods, and engine bearings. These kits are designed with motorsports in mind and have been proven dependable in high horsepower builds.


Applications available for Rotating Assemblies

EJ20 / EJ25 - Subaru EJ20/EJ25 Crankshafts
Fully Machined "Turbo Tuff Series" Billet For High Horsepower / High Boost Applications
  • 4340 Billet
  • Multi-step heat treatment process
  • Stress Relieved and Shot Peened
  • Nitrided
  • 100% Magnafluxed
  • Knife-edged counterweights
  • Center gun drilled
  • ďDirect Shot" dual main priority rod journal oiling
  • Gun drilled crank pin and counterweights
Billet Part No. Stroke Weight
190160B 75mm 19.50 lbs
190040B 79mm 19.75 lbs
190060B 83mm 21.50 lbs
Ordering a Manley Subaru Rotating Assembly is as easy as 1-2-3...

1. Choose your Crankshaft part number based on stroke and style and order the corresponding Rod and Main bearing part numbers shown.

2. Choose your connecting rod part number.

3. Choose your piston part number based on desired bore size and compression ratio (piston pins, locks and rings are included).

Ordering all of the required components for your rotating assembly from Manley will result in extra $ savings. Please contact your Manley representative for more details.

CRANKS
  • Premium heat treated forgings or lightweight 4340 billet
  • Multi-step heat treatment process and Nitrided for added strength
  • Stress relieved, shot-peened, and 100% magnafluxed
  • Fully profiled knife-edged counterweights on the billet forgings

RODS

  • 4340 material forgings or aircraft quality 300M material for extreme boost
  • Fully machined, heat treated, stress relieved, shot peened, and 100% magnafluxed
  • Big and small end bores are final honed to a tolerance of Ī .0002"
  • Bend and twist is tightly controlled
  • Weight matched to +/- 1.5 grams
  • H-Beam comes standard with 3/8" ARP 2000 bolts
  • H-Plus comes standard with 3/8" ARP 625+ bolts
  • I-Beam and 300M comes standard with 3/8" ARP 2000 bolts (affix an R6 suffix for ARP 625+ bolt upgrade)
PISTONS
  • High strength 2618 alloy forgings
  • Exacting ring groove squareness to cylinder wall provides maximum horsepower
  • Offset wrist pin design
  • Moly coated skirts

RINGS

  • 1.2 x 1.2 x 2.8mm 4G63/4G64/EJ20
  • 1.2 x 1.2 x 2.0mm EJ25
  • Total Seal steel tops standard
  • Rings included in piston kits

BEARINGS

  • Premium ACL Race Series with narrowed rod bearings

EJ20 / EJ25 - Subaru EJ20 STD Stroke Series
"Turbo Tuff" Billet 75mm Stroke Crank
Crank P/N Type Rod P/N Desc. Bearing P/N Desc. Piston P/N Piston Desc. Compression Ratio
48cc
190160B - Billet 14024-4 - 130.5mm H-Beam
or
15024-4 - 130.5mm H-Tuff
or
14416-4 - 130.5mm TT I-Beam
30070 - Rod
&
33070 - Mains w/ #5 Thrust
or
33080 - Mains w/ #3 Thrust
615000C-4 92mm/-12cc Dish 8.5
615005C-4 92.5/-12cc Dish 8.5
615010C-4 93mm/-12cc Dish 8.5






EJ20 / EJ25 - Subaru EJ20 Stroker Series
"Turbo Tuff" Billet 79mm Stroke Crank
Crank P/N Type Rod P/N Desc. Bearing P/N Desc. Piston P/N Piston Desc. Compression Ratio
48cc
190040B - Billet 14024-4 - 130.5mm H-Beam
or
15024-4 - 130.5mm H-Tuff
or
14416-4 - 130.5mm TT I-Beam
30070
Rod
&
33070
Mains w/ #5 Thrust
or
33080
Mains w/ #3 Thrust
620000C-4 92mm/-16cc Dish 8.5
620005C-4 92.5mm/-16cc Dish 8.5
620010C-4 93mm/-16cc Dish 8.5






EJ20 / EJ25 - Subaru EJ25 De-Stroked Series
"Turbo Tuff" Billet 75mm Stroke Crank
Crank P/N Type Rod P/N Desc. Bearing P/N Desc. Piston P/N Piston Desc. Compression Ratio
51cc
190160B - Billet 14024-4 - 130.5mm H-Beam
or
15024-4 - 130.5mm H-Tuff
or
14416-4 - 130.5mm TT I-Beam
30070
Rod
&
33070
Main
621000C-4 99.5mm/-18cc Dish 8.5
621002C-4 99.75/-18cc Dish 8.5
621005C-4 100mm/-18cc Dish 8.5
621100C-4 99.5mm/-6cc Dish 9.8
621102C-4 99.75mm/-6cc Dish 9.8
621105C-4 100mm/-6cc Dish 9.8




EJ20 / EJ25 - Subaru EJ25 STD Stroke Series
"Turbo Tuff" Billet 79mm Stroke Crank
Crank P/N Type Rod P/N Desc. Bearing P/N Desc. Piston P/N Piston Desc. Compression Ratio
51cc
190040B - Billet 14024-4 - 130.5mm H-Beam
or
15024-4 - 130.5mm H-Tuff
or
14416-4 - 130.5mm TT I-Beam
30070
Rod
&
33070
Main
612000C-4 99.5mm/-22cc Dish 8.5
612002C-4 99.75mm/-22cc Dish 8.5
612005C-4 100mm/-22cc Dish 8.5
612100C-4 99.5mm/-10cc Dish 9.8
612102C-4 99.75mm/-10cc Dish 9.8
612105C-4 100mm/-10cc Dish 9.8




EJ20 / EJ25 - Subaru EJ25 Stroker Series
"Turbo Tuff" Billet 83mm Stroke Crank
Crank P/N Type Rod P/N Desc. Bearing P/N Desc. Piston P/N Piston Desc. Compression Ratio
51cc
190060B - Billet 14024-4 - 130.5mm H-Beam
or
15024-4 - 130.5mm H-Tuff
or
14416-4 - 130.5mm TT I-Beam
30070
Rod
&
33070
Main
622000C-4 99.5mm/-26cc Dish 8.5
622002C-4 99.75mm/-26cc Dish 8.5
622005C-4 100mm/-26cc 8.5
622100C-4 99.5mm/-14cc Dish 9.8
622102C-4 99.75mm/-14cc Dish 9.8
622105C-4 100mm/-14cc Dish 9.8


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