SMALL BLOCK CHEVY
BIG BLOCK CHEVY
FORD
MOPAR
BUICK
NHRA
BIG BLOCK FLAT TOP

These big block pistons are compatible with forced induction, nitrous and angle milled heads. Valve reliefs will accommodate oversized valves and long duration, tight lobe separation cams. Compression Height figured using 9.780" block height with zero deck clearance. Precision CNC machined ring grooves accept 1/16, 1/16, 3/16 rings. Will fit both open and closed chamber cylinder heads.

Includes:
Pin #990-2930-18-51S (174g)
Double spiro locks (#990-042-CS)

BIG BLOCK CHEVY FLAT TOP SERIES
Std Bore: 427/454 = 4.250, 502 BBC = 4.466
Ring package designed for: 1/16, 1/16, 3/16 Rings
 Tech and Installation Tips
 Valve Relief Diagram
Part # Cubic
Inches		 Bore Stroke Rod
Length		 Block
Height		 Compression
Distance
Head Cubic Centimeters
110cc 118cc 124cc
Compression Ratio
Dome
Volume		 Gram
Weight		 Footnote Oversize
257960 467 4.310 4.000 6.535 9.780 1.245 8.8 8.3 8.0 -3.0 560 B 0.060
257961 509 4.500 4.000 6.535 9.780 1.245 9.5 9.0 8.6 -3.0 611 B 0.034
257962 522 4.560 4.000 6.535 9.780 1.245 9.7 9.2 8.8 -3.0 634 B 0.094
257963 532 4.600 4.000 6.535 9.780 1.245 9.8 9.2 8.9 -3.0 631 B 0.134
257964 496 4.310 4.250 6.385 9.780 1.270 9.2 8.7 8.4 -3.0 558 B 0.060
257965 540 4.500 4.250 6.385 9.780 1.270 10.0 9.4 9.1 -3.0 617 B 0.034
257966 548 4.530 4.250 6.385 9.780 1.270 10.1 9.6 9.2 -3.0 626 B 0.064
257967 555 4.560 4.250 6.385 9.780 1.270 10.2 9.7 9.3 -3.0 643 B 0.094
257968 565 4.600 4.250 6.385 9.780 1.270 10.3 9.8 9.4 -3.0 639 B 0.134
257969 460 4.280 4.000 6.385 9.780 1.395 8.7 8.2 7.9 -3.0 574   0.030
257970 467 4.310 4.000 6.385 9.780 1.395 8.8 8.3 8.0 -3.0 580   0.060
257971 509 4.500 4.000 6.385 9.780 1.395 9.5 9.0 8.6 -3.0 637   0.034
257972 516 4.530 4.000 6.385 9.780 1.395 9.6 9.1 8.7 -3.0 647   0.064
257973 523 4.560 4.000 6.385 9.780 1.395 9.7 9.2 8.8 -3.0 662   0.094
257974 439 4.310 3.766 6.385 9.780 1.520 8.3 7.9 7.6 -3.0 611   0.060
257975 479 4.500 3.766 6.385 9.780 1.520 9.0 8.5 8.2 -3.0 667   0.034
257976 486 4.530 3.766 6.385 9.780 1.520 9.1 8.6 8.2 -3.0 CALL   0.064
257977 489 4.280 4.250 6.135 9.780 1.520 9.1 8.6 8.3 -3.0 595   0.030
257974 496 4.310 4.250 6.135 9.780 1.520 9.2 8.7 8.4 -3.0 611   0.060
257975 540 4.500 4.250 6.135 9.780 1.520 10.0 9.4 9.1 -3.0 667   0.034
257976 548 4.530 4.250 6.135 9.780 1.520 10.1 9.6 9.2 -3.0 681   0.064
257978 555 4.560 4.250 6.135 9.780 1.520 10.2 9.7 9.3 -3.0 686   0.094
257979 455 4.255 4.000 6.135 9.780 1.640 8.6 8.1 7.8 -3.0 CALL M 0.005
257980 460 4.280 4.000 6.135 9.780 1.640 8.7 8.2 7.9 -3.0 618   0.030
257981 467 4.310 4.000 6.135 9.780 1.640 8.8 8.3 8.0 -3.0 631   0.060
257983 501 4.466 4.000 6.135 9.780 1.645 9.3 8.8 8.4 -3.0 CALL M 0.000
257984 509 4.500 4.000 6.135 9.780 1.645 9.5 9.0 8.6 -3.0 690   0.034
257985 515 4.530 4.000 6.135 9.780 1.645 9.6 9.1 8.7 -3.0 702   0.064
257986 522 4.560 4.000 6.135 9.780 1.645 9.7 9.2 8.8 -3.0 714   0.094
257987 433 4.280 3.766 6.135 9.780 1.765 8.2 7.8 7.5 -3.0 649   0.030
257988 439 4.310 3.766 6.135 9.780 1.765 8.3 7.9 7.6 -3.0 653   0.060
257989 441 4.320 3.766 6.135 9.780 1.765 8.3 7.9 7.6 -3.0 CALL M 0.070

Did you know? - we also offer a complete line of pistons for this particular application in our SRP product line? Click here to check them out.
 

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