Manley: Subaru EJ25 Stroker Series

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).

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 ą .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.

Please choose your selections from the drop down menus on the right.
Stock Images Used. Actual Product May Vary.