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SMALL BLOCK CHEVY
BIG BLOCK CHEVY
FORD
MOPAR
BUICK
NHRA
350 / 400 18º FLAT TOP

These pistons feature JEs race-proven low friction skirt design and are compatible with angle milled heads. Valve reliefs will accommodate oversized valves and long duration, tight lobe separation cams. Precision CNC machined ring grooves accept 1/16, 1/16, 3/16 rings. These pistons utilize dedicated left and right hand forgings.

350 Series Includes:
Pin #927-2750-15-51S (130g)
.073 alloy spiro lock #927-073-AS
Double Pin Oilers
400 Series Includes:
Pin #927-2950-15-51S (140g)
.073 alloy spiro lock #927-073-AS
Double Pin Oilers

350 Series
Std Bore: 4.000
Ring package designed for: 1/16, 1/16, 3/16 Rings

 Tech and Installation Tips
 Valve Relief Diagram
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
52cc 55cc 58cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
190422 357 4.030 3.500 6.000 9.000 1.250 11.9 11.4 10.9 -6.0 445 A 0.030 J100F8-4030-5
190423 359 4.040 3.500 6.000 9.000 1.250 11.9 11.4 10.9 -6.0 449 A 0.040 J100F8-4040-5

400 SERIES
Std Bore: 4.125
Ring package designed for: 1/16, 1/16, 3/16 Rings
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
52cc 55cc 58cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
181951 428 4.125 4.000 6.000 9.000 1.000 14.0 13.4 12.9 -6.0 423 B STD J10008-4125-5
181952 429 4.130 4.000 6.000 9.000 1.000 14.0 13.4 12.9 -6.0 425 B 0.005 J10008-4130-5
181953 430 4.135 4.000 6.000 9.000 1.000 14.0 13.4 12.9 -6.0 428 B 0.010 J10008-4135-5
181954 432 4.145 4.000 6.000 9.000 1.000 14.1 13.5 13.0 -6.0 434 B 0.020 J10008-4145-5
181955 434 4.155 4.000 6.000 9.000 1.000 14.1 13.5 13.0 -6.0 438 B 0.030 J10008-4155-5
181956 436 4.165 4.000 6.000 9.000 1.000 14.2 13.7 13.1 -6.0 441 B 0.040 J10008-4165-5
181957 414 4.125 3.875 6.000 9.000 1.062 13.6 13.1 12.6 -6.0 435 B STD J10008-4125-5
181958 415 4.130 3.875 6.000 9.000 1.062 13.6 13.1 12.6 -6.0 437 B 0.005 J10008-4130-5
181959 418 4.145 3.875 6.000 9.000 1.062 13.7 13.2 12.7 -6.0 443 B 0.020 J10008-4145-5
181960 420 4.155 3.875 6.000 9.000 1.062 13.7 13.2 12.7 -6.0 450 B 0.030 J10008-4155-5
181961 422 4.165 3.875 6.000 9.000 1.062 13.8 13.3 12.8 -6.0 454 B 0.040 J10008-4165-5
243033 401 4.125 3.750 6.000 9.000 1.125 13.2 12.7 12.2 -6.0 433 B STD J10008-4125-5
243034 402 4.130 3.750 6.000 9.000 1.125 13.2 12.7 12.2 -6.0 433 B 0.005 J10008-4130-5
243035 403 4.135 3.750 6.000 9.000 1.125 13.2 12.7 12.2 -6.0 436 B 0.010 J10008-4135-5
243036 405 4.145 3.750 6.000 9.000 1.125 13.3 12.8 12.3 -6.0 441 B 0.020 J10008-4145-5
243037 407 4.155 3.750 6.000 9.000 1.125 13.3 12.8 12.3 -6.0 446 B 0.030 J10008-4155-5
243038 409 4.165 3.750 6.000 9.000 1.125 13.4 12.9 12.3 -6.0 451 B 0.040 J10008-4165-5

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