CHEVROLET

Cyl.
Engine
Bore		 Years
Comp.
Ratio		 NOTES: Part No.
Sizes		 Rings O.E. Assy.
No.		 O.E. Casting
No.		 Head
Shape
L6 230
3.8 L
3.875(IN)
98.4(MM)

CHEVY
ENGINE
1963-70

8.3
Flat head with four valve reliefs.

APPROXIMATE HEAD VOLUME=3cc

Comp. Ht. 1.779
Pin Dia..9273 Offset
1412
Std.
.020
.030
.040
.060
.080
2-5/64
1-3/16
3792534
3840148
3860407
3791692
3859167
V6 231
3.8 L
3.800(IN)
96.52(MM)

BUICK
ENGINE
1975-87

8.0
Non-turbo, VIN A. 3.05" dia. head recess .215" deep.

APPROXIMATE HEAD VOLUME=24.5cc

Comp. Ht. 1.805
Pin Dia..9398 Offset
1731
Std.
.020
.030
.040
.060
2-5/64
1-3/16
25501423
1249538
125377
25518053
25527178
1255672
1247241
25516057
25522904
25519456
V6 231
3.8 L
3.800(IN)
96.5(MM)

BUICK
ENGINE
1975-87

8.5
Hypereutectic, destroked .020". Non-turbo, VIN A. 3.05" dia. head recess .235" deep.

APPROXIMATE HEAD VOLUME=25.5cc

Comp. Ht. 1.805
Pin Dia..9398 Offset
H1740
Std.
.020
.030
.040
.060
2-5/64
1-3/16
1249538
25501423
125377
25518053
25527178
1247241
1255672
25516057
25522904
25519456
V6 231
3.8 L
3.800(IN)
96.5(MM)

BUICK
ENGINE
1979-87

8.0
Turbo 3.05" dia. head recess .245" deep.

APPROXIMATE HEAD VOLUME=26cc

Comp. Ht. 1.805
Pin Dia..9398 Offset
1735
Std.
.020
.030
.040
.060
2-5/64
1-3/16
25502381
25515840
25519444
25528265
25502339
25515094
25518433
25526298
V6 231
3.8 L
3.800(IN)
96.5(MM)

BUICK
ENGINE
1988-92

8.5
Lumina. 3.10" dia. head recess .25" deep.

APPROXIMATE HEAD VOLUME=25.5cc

Comp. Ht. 1.386
Pin Dia..9054 Offset
1738
Std.
.5mm
.75mm
1.0mm
2-1.5mm
1-3.0mm


Shallow
Groove
24501072
25533087
25530461
V6 231
3.8 L
3.800(IN)
96.5(MM)

BUICK
ENGINE
1993-95
Lumina APV. Similar to 1738 exc. higher comp. height and ring pack. Except supercharged. 3.10" dia. head recess, .295" deep.

Comp. Ht. 1.443
Pin Dia..9054 Offset
1744*
Std.
.5mm
.75mm
1.0mm
1-1.2mm
1-1.5mm
1-3.0mm

Shallow
Groove
24502953
25530461
V6-231
3.8L
3.800(IN)
96.5(MM)

BUICK
ENGINE
1995-98
Hypereutectic. Except supercharged. VIN K. 2.86" dia. head recess, .05" deep.

Comp. Ht. 1.090
Pin Dia..8662 Offset
H1745**
STD.
0.5mm
.75mm
1.0mm
1-1.2mm
1-1.5mm
1-2.0mm
12537408-9
23706D
L6 235
3.9 L
3.562(IN)
90.5(MM)

CHEVY
ENGINE
1941-62

7.7
Flat head.

Comp. Ht. 2.060
Pin Dia..8650 Offset
1413
Std.
.020
.030
.040
.060
.080
2-3/32
1-3/16
3693984
3707453
3702622
3835996
L6 250
4.1 L
3.875(IN)
98.4(MM)

CHEVY
ENGINE
1966-84

8.4
3" dia. "D" head recess .060" deep.

APPROXIMATE HEAD VOLUME=7cc

Comp. Ht. 1.640
Pin Dia..9273 Offset
1446
Std.
.020
.030
.040
.060
2-5/64
1-3/16
3886040
3886048
6270033
3874468
3877604
6262805
* NEW PISTON, AVAILABLE NOW
**NEW PISTON, CHECK FOR AVAILABILITY

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