Manley 04+ Subaru WRX/STI EH257 99.50mm STD (Grade B) Bore 8.5:1 Dish Piston (SINGLE PISTON)
$245.99
Our signature "Platinum Series" pistons feature 2618 alloy forgings, proven cam and barrel skirt profiles, tool steel wrist pins, and moly skirt coatings on select part numbers. Join the ranks of professional engine builders and tuners who rely on Manley pistons for superior performance and durability.
Manley Piston Single, SUBARU 99.5mm/1.209 CD/DISH Extreme Duty
Manley Piston Single, SUBARU 99.5mm/1.209 CD/DISH - Extreme Duty
- Chrome Moly Wrist Pins: Premium Chrome Moly wrist pins come standard with our Standard Series Pistons. For select SKUs, we offer wrist pin upgrades to 9310 and Turbo Tuff/DLC alloys, providing additional durability.
- Unique Fixturing: Manley's unique fixturing allows for skirt turning and ring groove machining in a single operation, ensuring ultimate ring groove to skirt squareness.
- Exacting Ring Lands and Grooves: We adhere to strict standards for piston ring lands and grooves, resulting in enhanced ring seal and more power.
- Cam and Barrel Profiles: Our pistons boast cam and barrel (skirt) profiles that generate substantial power while being gentle on cylinder walls.
- 2618 Alloy Forgings: We use domestic 2618 alloy forgings, ensuring superior strength and performance.
The Manley Performance Subaru WRX and STI 99.5mm dished piston from the Platinum Series offers professional-grade performance and durability for high-performance engine builds. Crafted from premium 2618 alloy forgings, this piston provides exceptional strength to withstand extreme conditions. Its cam and barrel (skirt) profiles are engineered to generate substantial power while maintaining gentle contact with the cylinder walls, promoting longevity and optimal performance. Designed with precise ring lands and grooves, it ensures superior ring seal, which translates into increased horsepower and efficiency. The piston is equipped with chrome moly wrist pins as standard, with options for upgraded alloys such as 9310 and Turbo Tuff/DLC for enhanced durability in demanding applications. Unique fixturing during manufacturing allows for ring groove and skirt machining in a single operation, ensuring perfect squareness and consistency. This piston is ideal for tuners and professional engine builders seeking reliable, high-performance components for Subaru 2.0L turbo engines. Note that this part is not carb compliant but is suitable for use in applications where carb approval isn't required, and it does require carb acknowledgment. The piston is lightweight with a total weight of approximately 0.24 pounds, making it suitable for high-revving engines. With a bore diameter of 99.5mm and a dish design, it provides a compression ratio of 8.5:1, ideal for forced induction setups. Backed by Manley's reputation for quality, this piston is an excellent choice for building robust Subaru engines capable of handling aggressive tuning and demanding driving conditions.
Features:
- 2618 alloy forgings for superior strength and performance
- Cam and barrel (skirt) profiles designed for power and cylinder wall friendliness
- Chrome moly wrist pins included as standard, with optional upgrades to 9310 and Turbo Tuff/DLC alloys
- Unique fixturing allows for integrated skirt turning and ring groove machining
- Strict standards for ring lands and grooves for enhanced sealing and power