Manley 04+ Subaru WRX/STI EH257 99.50mm Bore STD Size 8.5:1 Dish Extreme Duty Piston Set
$1,019.99
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 Set, SUBARU 99.5mm/GRADE B 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 Subaru WRX/STI 99.5mm Bore Extreme Duty Piston Set is engineered for high-performance automotive applications, delivering superior strength and durability for demanding engines. Crafted with 2618 alloy forgings, these pistons provide a robust foundation that withstands high stress and heat, making them ideal for rebuilds and upgrades focused on increased power output. The design features proven cam and barrel (skirt) profiles that generate substantial torque while maintaining gentle contact with the cylinder walls, reducing wear and enhancing longevity.
The piston set includes chrome moly wrist pins, which are standard on this model, offering excellent strength and resistance to fatigue. For select configurations, there is an option to upgrade to 9310 or Turbo Tuff/DLC alloys, further enhancing durability under extreme conditions. Unique fixturing technology allows for precise skirt turning and ring groove machining in a single operation, ensuring perfect ring land and groove alignment for optimal sealing and power delivery. The pistons' strict adherence to manufacturing standards results in enhanced ring sealing, which translates into better compression and increased engine performance.
Designed specifically for Subaru engines, these pistons feature an 8.5:1 compression ratio and a 99.5mm bore, making them suitable for a variety of high-performance builds. The set is built to meet the demands of professional engine builders and tuners who require reliable and consistent components. Please note, this product requires carburetor acknowledgment and is not CARB approved, emphasizing its suitability for racing or off-highway use. Each set is meticulously produced to ensure compatibility and performance, making it a valuable upgrade for Subaru enthusiasts seeking to push their engines to the next level.
Features:
- 2618 alloy forging: Ensures superior strength and heat resistance for high-performance applications
- Chrome moly wrist pins: Standard with options for upgraded alloys such as 9310 and Turbo Tuff/DLC for enhanced durability
- Unique fixturing: Enables skirt turning and ring groove machining in a single precise operation
- Exacting ring lands and grooves: Improves ring seal for better compression and power output
- Cam and barrel profiles: Designed to produce substantial power while being gentle on cylinder walls