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JE Pistons - SB Chevy 350/400 Extreme Duty 23° Inverted Dome Includes: Pistons, Pins, Double Spiro Locks These pistons are specially designed for forced induction and nitrous applications. Pistons include .310" pocket depths and precision CNC machined ring grooves that accept 1/16, 1/16, 3/16 rings. - Contact Reduction Grooves - Double Pin Oilers - Double Spiro Locks

Part # Bore Stroke Rod Length C/H Comp Ratio 58cc 64cc 76cc Dome Vol. Foot Notes Grms Price 350 Series - Std. Bore: 4.000 170817 4.030 3.750 6.000 1.125 9.3 8.8 8.2 -28.0 B 430 $786 194887 4.060 3.750 6.000 1.125 9.4 8.9 8.3 -28.0 B 445 $786 232515 4.000 3.750 6.000 1.145 9.1 8.7 8.1 -28.0 B 440 $786 218591 4.030 3.500 6.000 1.250 8.9 8.4 7.6 -26.0 A, B 458 $786 232513 4.000 3.500 6.000 1.270 8.8 8.3 7.5 -26.0 A, B 488 $786 131631 4.030 3.750 5.700 1.425 9.0 8.5 7.8 -31.0 - 485 $739 131635 4.020 3.480 5.700 1.560 9.1 8.6 7.8 -22.0 A 512 $739 131636 4.030 3.480 5.700 1.560 9.2 8.7 7.8 -22.0 A 515 $739 400 Series - Std. Bore: 4.125 242885 4.125 3.750 6.000 1.125 9.6 9.1 8.5 -28.0 B - $786 170818 4.155 3.750 6.000 1.125 9.7 9.2 8.6 -28.0 B 476 $786 194888 4.165 3.750 6.000 1.125 9.8 9.2 8.6 -28.0 B 483 $786 232516 4.125 3.750 6.000 1.125 9.6 9.1 8.2 -28.0 B 466 $786 131633 4.155 3.750 5.700 1.425 9.1 8.7 7.8 -36.0 - 513 $739 232514 4.125 3.750 5.700 1.425 8.9 8.5 7.8 -36.0 - 512 $739

Foot Notes: A = Fits 3.480 and 3.500 Stroke B = Oil Rail Support Included

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