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Diamond Pistons Buick 231 Forced Induction Dish Series Pistons 21402
Part Number: DPP-21402
Diamond Pistons Buick 231 Forced Induction Dish Series Pistons
Buick 231 DS 3.830B/1.850CD
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Estimated Ship Date: Dec 18, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
21402
Part Type:
Product Line:
Summit Racing Part Number:
DPP-21402
UPC:
193564387257
Piston Rings Included:
Yes
Bore (in.):
3.830 in.
Bore (mm):
97.282mm
Stroke:
3.400 in.
Engine Stroke Type:
Stock
Actual Engine Displacement:
3.9L/235
Rod Length:
5.960 in.
Piston Style:
Dish, with two valve reliefs
Piston Material:
Forged aluminum
Compression Height (in.):
1.850 in.
Piston Head Volume (cc):
+29.50cc
Wrist Pin Style:
Floating
Wrist Pin Retainers Included:
Yes
Wrist Pin Included:
Yes
Pin Diameter (in.):
0.940 in.
Piston Ring Thickness:
1/16 in. x 1/16 in. x 3/16 in.
File Fit:
Yes
Gapless:
No
Top Ring Thickness:
1/16 in.
Top Ring Material:
Steel
Top Ring Facing Material:
Plasma-moly
Second Ring Thickness:
1/16 in.
Second Ring Material:
Ductile iron
Second Ring Facing Material:
Ductile iron
Oil Ring Thickness:
3/16 in.
Oil Ring Material:
Stainless steel
Oil Ring Tension:
Standard
Remanufactured:
No
Quantity:
Sold individually.
Notes:
Piston is 2618 material.
Diamond Pistons Buick 231 Forced Induction Dish Series Pistons
Diamond Pistons Buick 231 Forced Induction Dish Series pistons are available for a variety of applications, including many GM V6 engines from the 1970s and '80s. Forged from aluminum with two valve reliefs, the dish-style pistons are offered in different bore sizes and numerous 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 pockets
* Designed for mild boost applications
* Pins, locks, and support rails (if required) included
Applications
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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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