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Diamond Pistons

Diamond Pistons Marine Series 70025-8 - Replacement Mercury Racing Stern Engines - Coated Skirts - Includes Pins and Rings

SKU: DPP70025-8

Pistons
Diamond Pistons Marine Series 70025-8 - Replacement Mercury Racing Stern Engines - Coated Skirts - Includes Pins and Rings

Diamond Pistons

Diamond Pistons Marine Series 70025-8 - Replacement Mercury Racing Stern Engines - Coated Skirts - Includes Pins and Rings

SKU: DPP70025-8

Pistons
A$3,695.24
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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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
70025-8
Product Attributes - Part Type
Pistons
Product Attributes - Product Line
Diamond Pistons Marine Series Pistons
Product Attributes - UPC
686162220199
Product Attributes - Piston Rings Included
Yes
Product Attributes - Bore (in.)
4.254 in.
Product Attributes - Bore (mm)
108.052mm
Product Attributes - Stroke
4.000 in.
Product Attributes - Engine Stroke Type
Stock
Product Attributes - Rod Length
6.135 in.
Product Attributes - Piston Style
Flat top, with two valve reliefs
Product Attributes - Piston Material
Forged aluminum
Product Attributes - Compression Height (in.)
1.645 in.
Product Attributes - Piston Head Volume (cc)
+0.70cc
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 dpp70025-8
SFX Item ID 5528693
Supplier Item Code 5528693
Manufacturer SKU 70025-8
Manufacturer UPC 686162220199

Compatibility

Application Data
  • MakeCHEVROLET
    Engine TypeV8
    Engine FamilyChevy big block Gen VI
    Engine Size7.4L/454
    Application NotesFor use with Mercury Marine 454 Magnum engines.

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