Subaru STi EJ257 2.71L Stroker Kit (by Brian Crower)
The BC stroker kit for the Subaru EJ25 engine uses a custom 83mm monster stroke, steel billet crankshaft rather than a reworked factory EJ25 crank. Depending on the bore size chosen, the BC kit will take the EJ25 up to a 2.71L displacement with a safe 102mm bore.
As always, each BC kit includes custom CP forged aluminum pistons, premium alloy wrist pins, full ring pack, and buttons. Significant power and torque gains. BC ProH2K rods are rated to 600 horsepower, and BC Pro series rods are rated to 800+ horsepower.
Features
- BC 4340 billet steel crankshaft (83mm stroke)
- BC 4340 ProH2K or Pro H625+ connecting rods
- Forged aluminum pistons
- Ductile iron plasma top rings, tapered second ring, and low tension oil rings
- Fully system balanced and ready to install
Benefits
- High-quality construction and components
- Increases vehicle displacement up to 2.71L with a safe 102mm bore
Applications
- 2004 - 2021 Subaru STI
What's In The Box?
- 1 - 4340 Billet Crank (83mm stroke)
- 1 - Set of connecting rods
- 1 - Set of pistons and rings
Warranty
- Standard Manufacturer's Warranty