JE Shelf Pistons 99.5mm Bore 8.5:1 CR | 2004-2015 Subaru STI (EJ25 w/EJ20 Heads) (291059)
JE Pistons new FSR forgings for the 2004-2015 Subaru STI EJ257 engine with EJ20 heads are both strong and lightweight! The new FSR design has undergone extensive on-track testing to ensure flawless performance under the most demanding conditions.
- 2618 T6 high tensile forged aluminum
- Comp Ratio: 8.5:1
- Bore: 99.5mm
- Gram Weight: 411
- Dome CC: -25.5
- Head CC: 48.0
- Stroke: 79mm
- Rod: 130.5mm
- Specifically engineered for high horsepower Subaru engines.
- Dome and dishes feature smooth flowing radii for excellent flame travel.
- Pin fitting and Tru Arc locks included.
- JE Pro Seal Rings Included.
- Piston Profile Matches EJ20 Chamber Profile. No Cylinder Head Mofications Necessary.
- 2004-2015 Subaru STI
- Notes: Designed for EJ257 Motor with EJ20 Heads
- Piston Set
- Pin fitting and Tru Arc locks included
- JE Pro Seal Rings Included
- .905 x 2.250 straight wall carbon steel wrist pin