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Diamond Pistons

Diamond Pistons Big Block 24/26 Degree Pro Dome Series 12391-8-H 396/454 24° 4.600B/1.218CD/Kit

SKU: DPP12391-8-H

Pistons
Diamond Pistons Big Block 24/26 Degree Pro Dome Series 12391-8-H 396/454 24° 4.600B/1.218CD/Kit

Diamond Pistons

Diamond Pistons Big Block 24/26 Degree Pro Dome Series 12391-8-H 396/454 24° 4.600B/1.218CD/Kit

SKU: DPP12391-8-H

Pistons
A$3,871.72
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 Big Block 24/26 Degree Pro Dome Series pistons are available for a variety of applications, including many Chevrolet V-8 engines from 1965-90. Forged from aluminum with no valve relief, these dome-style pistons are offered in different bore, stroke, and rod length sizes—along with several other options. Order individually or in a set of 8.

Additional details:

* 1,000 hp rated
* Forced pin oilers from the oil ring
* Pin fitted
* 3-D dome and pockets
* Pins, locks and support rails (if required) included

Part Type

Pistons

Data: v4.2 - Upd: 2026-10-14 08:50:54

Specifications

Product Attributes - Brand
Diamond Pistons
Product Attributes - Manufacturer's Part Number
12391-8-H
Product Attributes - Part Type
Pistons
Product Attributes - Product Line
Diamond Pistons Big Block 24/26 Degree Pro Dome Series Pistons
Product Attributes - UPC
193564383372
Product Attributes - Piston Rings Included
Yes
Product Attributes - Bore (in.)
4.600 in.
Product Attributes - Bore (mm)
116.840mm
Product Attributes - Stroke
4.375 in.
Product Attributes - Engine Stroke Type
Stroked
Product Attributes - Actual Engine Displacement
9.5L/582
Product Attributes - Rod Length
6.385 in.
Product Attributes - Piston Style
Dome, with single valve relief
Product Attributes - Piston Material
Forged aluminum
Product Attributes - Compression Height (in.)
1.218 in.
Product Attributes - Piston Head Volume (cc)
-42.00cc
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 3.00mm
Product Attributes - File Fit
Yes
Product Attributes - Gapless
No
Product Attributes - Top Ring Thickness
0.043 in.
Product Attributes - Top Ring Material
Ductile iron
Product Attributes - Top Ring Facing Material
Plasma-moly
Product Attributes - Second Ring Thickness
0.043 in.
Product Attributes - Second Ring Material
Ductile iron
Product Attributes - Second Ring Facing Material
Ductile napier
Product Attributes - Oil Ring Thickness
3.0mm
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
For use on 9.800 in. deck height blocks. Pistons are 2618 material. Includes H-13 wrist pins and oil rail supports.

Reference Information

Brand Name/s Diamond Pistons
StreetFX SKU dpp12391-8-H
SFX Item ID 5524838
Supplier Item Code 5524838
Manufacturer SKU 12391-8-H
Manufacturer UPC 193564383372
Alternative References 24°, 4.600B/1.218CD/Kit

Compatibility

Application Data
  • MakeCHEVROLET
    Beginning Year1965
    Ending Year1969
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size6.5L/396
    Application NotesFor use on 9.800 in. deck height blocks. Pistons are 2618 material. Includes H-13 wrist pins and oil rail supports.
  • MakeCHEVROLET
    Beginning Year1970
    Ending Year1990
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size7.4L/454
    Application NotesFor use on 9.800 in. deck height blocks. Pistons are 2618 material. Includes H-13 wrist pins and oil rail supports.

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