Manley Performance 04+ Subaru WRX/STI EH257 100mm Bore Dish Piston Set

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 Set, PIST-SUBARU 100mm/1.209 CD/DISH T/T.

• 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 EH257 piston set is specifically designed for Subaru WRX and STI models from 2004 and newer, offering a reliable upgrade for high-performance applications. Crafted with premium 2618 aluminum alloy forgings, these pistons deliver exceptional strength and durability under demanding conditions. The piston set features proven cam and barrel (skirt) profiles that generate significant power while maintaining a gentle touch on cylinder walls, promoting longevity and consistent performance. Precision machined ring grooves and lands ensure optimal sealing, which translates into enhanced compression and power output, making these pistons an excellent choice for enthusiasts and professional tuners alike.
Manley's unique fixturing process allows for the ring groove and skirt turning to be completed in a single operation, ensuring perfect squareness and fitment. The pistons are equipped with high-quality chrome moly wrist pins as standard, with options for upgraded materials such as 9310 or Turbo Tuff/DLC alloys for additional durability. The moly skirt coatings on select part numbers further improve wear resistance and reduce friction, contributing to improved engine efficiency.
Designed to meet the rigorous demands of high-performance engines, these pistons are not carb compliant and require proper acknowledgment of carb restrictions during installation. They are shipped individually and are ideal for custom engine builds or rebuilds where superior piston performance is required. With a bore size of 100mm and a compression ratio of 8.5:1, these pistons provide a balanced combination of power and reliability for turbocharged Subaru engines, ensuring a long service life and optimal performance in street and racing applications.

Features:

• 2618 alloy forgings: Ensures superior strength and durability for high-performance applications

• Cam and barrel (skirt) profiles: Designed to generate substantial power while being gentle on cylinder walls

• Proven ring and groove machining: Achieved through unique fixturing for ultimate squareness and sealing

• Exacting ring lands and grooves: Enhances ring seal and engine compression

• Chrome moly wrist pins: Standard with options for upgraded alloys like 9310 and Turbo Tuff/DLC

• Moly skirt coatings: Select part numbers feature coatings that reduce friction and wear

• Designed for Subaru WRX/STI 2004+ models: Fits 100mm bore with 8.5:1 compression ratio

• Not carb approved: Proper acknowledgment required during installation

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: false
Units Per Sku: 1