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Diamond Pistons

Diamond Pistons Marine Series 70056-8 - Replacement Mercury Racing Stern Engines - Coated Skirts - Includes Pins and Rings

SKU: DPP70056-8

Pistons
Diamond Pistons Marine Series 70056-8 - Replacement Mercury Racing Stern Engines - Coated Skirts - Includes Pins and Rings

Diamond Pistons

Diamond Pistons Marine Series 70056-8 - Replacement Mercury Racing Stern Engines - Coated Skirts - Includes Pins and Rings

SKU: DPP70056-8

Pistons
A$3,695.24
BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.
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Description

Diamond Pistons Marine Series pistons are ideal for your high-demand boats. These forged aluminum pistons are significantly stronger than the factory pistons allowing your engine to handle that extra horsepower, high-rpm operation and long hours on the water.

Diamond Pistons Marine Series pistons feature:

* 3D milling on piston crowns for "ready to install" finish
* Moly skirt coating for friction-loss and skirt-wear protection
* Oversized valve pockets for "larger than stock" valve sizes
* Forged 2618 or 4032 aluminum alloy (where specified)
* Premium 8620 or H-13 steel wrist pins (where specified)

Part Type

Pistons

Data: v4.2 - Upd: 2026-10-14 08:47:09

Specifications

Product Attributes - Brand
Diamond Pistons
Product Attributes - Manufacturer's Part Number
70056-8
Product Attributes - Part Type
Pistons
Product Attributes - Product Line
Diamond Pistons Marine Series Pistons
Product Attributes - UPC
686162220502
Product Attributes - Piston Rings Included
Yes
Product Attributes - Bore (in.)
4.470 in.
Product Attributes - Bore (mm)
113.538mm
Product Attributes - Stroke
4.000 in.
Product Attributes - Engine Stroke Type
Stock
Product Attributes - Rod Length
6.135 in.
Product Attributes - Piston Style
Dome, with single valve relief
Product Attributes - Piston Material
Forged aluminum
Product Attributes - Compression Height (in.)
1.645 in.
Product Attributes - Piston Head Volume (cc)
-3.30cc
Product Attributes - Wrist Pin Style
Floating
Product Attributes - Wrist Pin Retainers Included
Yes
Product Attributes - Wrist Pin Included
Yes
Product Attributes - Pin Diameter (in.)
0.990 in.
Product Attributes - Piston Ring Thickness
1/16 in. x 1/16 in. x 4.00mm
Product Attributes - File Fit
Yes
Product Attributes - Gapless
No
Product Attributes - Top Ring Thickness
1/16 in.
Product Attributes - Top Ring Material
Ductile iron
Product Attributes - Top Ring Facing Material
Plasma-moly
Product Attributes - Second Ring Thickness
1/16 in.
Product Attributes - Second Ring Material
Ductile iron
Product Attributes - Second Ring Facing Material
Ductile iron
Product Attributes - Oil Ring Thickness
4.0mm
Product Attributes - Oil Ring Material
Stainless steel
Product Attributes - Oil Ring Tension
High
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold as a set of 8.
Product Attributes - Notes
Pistons are 2618 material.

Reference Information

Brand Name/s Diamond Pistons
StreetFX SKU dpp70056-8
SFX Item ID 5528786
Supplier Item Code 5528786
Manufacturer SKU 70056-8
Manufacturer UPC 686162220502

Compatibility

Application Data
  • MakeCHEVROLET
    Engine TypeV8
    Engine FamilyChevy big block Gen VI
    Engine Size8.2L/500
    Application NotesFor use with Mercury Marine 500EFI engines.
  • MakeCHEVROLET
    Engine TypeV8
    Engine FamilyChevy big block Gen VI
    Engine Size8.6L/525
    Application NotesFor use with Mercury Marine 525EFI engines.

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