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For select SKUs, we offer wrist pin upgrades to 9310 and Turbo Tuff\/DLC alloys, providing additional durability.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.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.","vendor":"Manley Performance","product_type":"Piston Sets - Forged - 4cyl","created_at":"2024-01-21T01:39:40-05:00","handle":"manley-04-subaru-wrx-sti-ej257-83mm-stroker-99-75mm-25mm-size-bore-9-8-1-dish-piston-set","updated_at":"2025-12-25T15:19:17-05:00","published_at":"2024-01-21T01:39:40-05:00","template_suffix":null,"published_scope":"web","tags":"500-1000, CaseLotQuantity:1, ClearanceItem:N, Core:N, CorePrice:0, Engine Components\u003ePiston Sets - 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