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SMALL BLOCK CHEVY
BIG BLOCK CHEVY
FORD
MOPAR
BUICK
NHRA
BUICK GRAND NATIONAL

The overwhelming choice of the world’s fastest Buick engine builders. These pistons are engineered to produce maximum horsepower in extreme boost or nitrous applications. The inverted dome is designed to duplicate the factory compression ratio and the precision CNC machined ring grooves accept 1/16, 1/16, 3/16 rings.

Includes:
Pin #940-2750-16-51S (137g)
Double spiro locks (#927-042-CS)

BUICK GRAND NATIONAL SERIES
Std Bore: 3.800
Ring package designed for: 1/16, 1/16, 3/16 Rings

 Tech and Installation Tips
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
48cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
131556 234 3.820 3.400 5.960 9.510 1.850 Fact. Duplicate 8.5 -29.5 541   0.02 J100F6-3820-5
131557 235 3.830 3.400 5.960 9.510 1.850 Fact. Duplicate 8.5 -29.5 542   0.03 J100F6-3830-5

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