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Diamond Pistons

Diamond Pistons 18 Degree Big Chief/Big Duke Nitrous Dome Series 12766-8 Chief - 1600HP Rated - 2618 Material - Includes Pins and Rings

SKU: DPP12766-8

Pistons
Diamond Pistons 18 Degree Big Chief/Big Duke Nitrous Dome Series 12766-8 Chief - 1600HP Rated - 2618 Material - Includes Pins and Rings

Diamond Pistons

Diamond Pistons 18 Degree Big Chief/Big Duke Nitrous Dome Series 12766-8 Chief - 1600HP Rated - 2618 Material - Includes Pins and Rings

SKU: DPP12766-8

Pistons
A$4,266.96
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 18 Degree Big Chief/Big Duke Nitrous Dome Series pistons are available for a variety of applications—including many Chevrolet V-8 big block engines from 1965-90. Forged from aluminum with two valve reliefs, the dome-style pistons are offered in different bore, stroke, and rod length sizes—along with several other options.

Additional details:

* Forced pin oilers from the oil ring
* Pin fitted
* Vertical gas ports
* 3-D dome and pockets
* Designed for nitrous applications
* H-13 pins, locks and support rails (if required) included

Part Type

Pistons

Data: v4.2 - Upd: 2026-09-28 14:13:20

Specifications

Product Attributes - Brand
Diamond Pistons
Product Attributes - Manufacturer's Part Number
12766-8
Product Attributes - Part Type
Pistons
Product Attributes - Product Line
Diamond Pistons 18 Degree Big Chief/Big Duke Nitrous Dome Series Pistons
Product Attributes - UPC
686162207992
Product Attributes - Piston Rings Included
Yes
Product Attributes - Bore (in.)
4.610 in.
Product Attributes - Bore (mm)
117.094mm
Product Attributes - Stroke
4.750 in.
Product Attributes - Engine Stroke Type
Stroked
Product Attributes - Rod Length
6.700 in.
Product Attributes - Piston Style
Dome, with two valve reliefs
Product Attributes - Piston Material
Forged aluminum
Product Attributes - Compression Height (in.)
1.120 in.
Product Attributes - Piston Head Volume (cc)
-6.00cc
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
0.043 in. x 0.043 in. x 3/16 in.
Product Attributes - File Fit
Yes
Product Attributes - Gapless
No
Product Attributes - Top Ring Thickness
0.043 in.
Product Attributes - Top Ring Material
Stainless steel
Product Attributes - Top Ring Facing Material
C-23 PVD Chrome
Product Attributes - Second Ring Thickness
0.043 in.
Product Attributes - Second Ring Material
Ductile iron
Product Attributes - Second Ring Facing Material
Ductile iron
Product Attributes - Oil Ring Thickness
3/16 in.
Product Attributes - Oil Ring Material
Stainless steel
Product Attributes - Oil Ring Tension
Standard
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold as a set of 8.
Product Attributes - Notes
Pistons are 2618 material. Includes H-13 wrist pins.

Reference Information

Brand Name/s Diamond Pistons
StreetFX SKU dpp12766-8
SFX Item ID 5525101
Supplier Item Code 5525101
Manufacturer SKU 12766-8
Manufacturer UPC 686162207992
Alternative References 1600HP

Compatibility

Application Data
  • MakeCHEVROLET
    Beginning Year1970
    Ending Year1990
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size7.4L/454
    Application NotesFor use with Dart Big Chief/Big Duke 18 degree cylinder heads.

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