PONTIAC

Cyl.
Engine
Bore		 Years
Comp.
Ratio		 NOTES: Part No.
Sizes		 Rings O.E. Assy.
No.		 O.E. Casting
No.		 Head
Shape
V8-350
5.7L
4.000(IN)
101.6(MM)

CHEVY
ENGINE
1990-94

9.5
10.3
Firebird. Hypereutectic, destroked .020". Flat head with four valve reliefs.

APPROXIMATE HEAD VOLUME=7cc

Comp. Ht. 1.540
Pin Dia..9273 Offset
H1489*
STD.
.020
.030
.040
.060
1-2.0mm
1-1.5mm
1-4.0mm
10159436-7
12521445-6
10128452
T021101V13
10128454
V8-350
5.7L
4.057(IN)
103(MM)

OLDSMOBILE
ENGINE
1977-79

7.9
VIN R. 2.92" dia. head recess .215" deep.

APPROXIMATE HEAD VOLUME=21cc

Comp. Ht. 1.595
Pin Dia..9805 Offset
1633
STD.
.020
.030
.040
.060
2-5/64
1-3/16
231433
411891
V8-350
5.7L
4.057(IN)
103(MM)

OLDSMOBILE
ENGINE
1980-85

22.5
LF9 Diesel. Two large valve reliefs with fire slot. SOLD IN FULL SETS ONLY.

APPROXIMATE HEAD VOLUME=5cc

Comp. Ht. 1.770
Pin Dia..1.095 Offset
1637DLR
STD.
.020
.030
.040
2-5/64
1-3/16

Iron Top
Groove
560946
560955
22506674
2506678
22519229
22519232
558386
22511940
22520325
V8-400
6.6L
4.120(IN)
104.6(MM)

PONTIAC
ENGINE
1967-79

8.2
Piston with eight valve reliefs for use in either 1st or 2nd type engines.

APPROXIMATE HEAD VOLUME=10cc

Comp. Ht. 1.700
Pin Dia..9805 Offset
1526
STD.
.020
.030
.040
.060
2-5/64
1-3/16
9788366
9788369
478810
499053
9787610
497033
V8-403
6.6L
4.351(IN)
110.5(MM)

OLDSMOBILE
ENGINE
1977-78

8.2
3.23" diameter head recess .146" deep.

APPROXIMATE HEAD VOLUME=18.5cc

Comp. Ht. 1.595
Pin Dia..9805 Offset
1635
STD.
.020
.030
.040
.060
2-5/64
1-3/16
556265
554908
V8-455
7.5L
4.150(IN)
105.4(MM)

PONTIAC
ENGINE
1970-76

8.0
Flat head with four valve reliefs.

APPROXIMATE HEAD VOLUME=7cc

Comp. Ht. 1.480
Pin Dia..9805 Offset
1525
STD.
.020
.030
.040
.060
1-5/64
1-1/16
1-3/16
478812
485804
499052
477876
485028
497044
* NEW PISTON, AVAILABLE NOW
**NEW PISTON, CHECK FOR AVAILABILITY
Page 84

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