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Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.75mm +.25mm Bore 8.5:1 Dish SINGLE PISTON AND RING

SKU: MAN612002C-1

Pistons

MAN Single Pistons...

Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.75mm +.25mm Bore 8.5:1 Dish SINGLE PISTON AND RING

SKU: MAN612002C-1

Pistons

MAN Single Pistons...

A$374.75
Available from MFR. This item is available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical order processing and release times for this part. This item is not held in our own warehouse, and actual dispatch timing may vary depending on manufacturer workload and logistics at the time of ordering.
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Description

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.

Part Type

Engine Piston

Data: v4.2 - Upd: 2026-10-13 17:07:35

Features

  • 2618 Alloy Forgings: We use domestic 2618 alloy forgings, ensuring superior strength and performance.
  • Cam and Barrel Profiles: Our pistons boast cam and barrel (skirt) profiles that generate substantial power while being gentle on cylinder walls.
  • 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.
  • Exacting Ring Lands and Grooves: We adhere to strict standards for piston ring lands and grooves, resulting in enhanced ring seal and more power.
  • 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.

Specifications

Product Attributes - Brand
Manley
Product Attributes - Manufacturer's Part Number
612002C-1
Product Attributes - Part Type
Pistons
Product Attributes - Product Line
Manley Platinum Series Pistons
Product Attributes - UPC
807298024394
Product Attributes - Piston Rings Included
Yes
Product Attributes - Bore (in.)
3.927 in.
Product Attributes - Bore (mm)
99.750mm
Product Attributes - Stroke
3.110 in.
Product Attributes - Engine Stroke Type
Stock
Product Attributes - Rod Length
5.137 in.
Product Attributes - Piston Style
Dish, with four valve reliefs
Product Attributes - Piston Material
Forged aluminum
Product Attributes - Compression Height (in.)
1.209 in.
Product Attributes - Piston Head Volume (cc)
+22.00cc
Product Attributes - Wrist Pin Style
Press-fit or floating
Product Attributes - Wrist Pin Retainers Included
Yes
Product Attributes - Wrist Pin Included
Yes
Product Attributes - Pin Diameter (in.)
0.905 in.
Product Attributes - Piston Ring Thickness
1.20mm x 1.20mm x 2.00mm
Product Attributes - File Fit
Yes
Product Attributes - Gapless
No
Product Attributes - Top Ring Thickness
1.2mm
Product Attributes - Top Ring Material
Steel
Product Attributes - Second Ring Thickness
1.2mm
Product Attributes - Oil Ring Thickness
2.0mm
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold as a set of 4.
Product Attributes - Notes
Fits EJ257 engine. Coated skirts. Will allow up to +1.00mm larger valves.

Reference Information

Brand Name/s Manley Performance
StreetFX SKU man612002C-1
SFX Item ID 4060413
Supplier Item Code 4060413
Manufacturer SKU 612002C-1
Manufacturer UPC 807298024394
Alternative References (EJ257), 99.75mm, +.25mm

Compatibility

Application Data
  • MakeSUBARU
    Beginning Year2004
    Ending Year2023
    Engine TypeH4
    Engine FamilySubaru 4-cylinder
    Engine Size2.5L/2457cc
    Application NotesFits EJ257 engine. Coated skirts. Will allow up to +1.00mm larger valves.

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