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426 HEMI

Machined from high Silicon 4032 alloy for tighter, quieter running clearances (part # 131834 is manufactured from 2618 alloy which by design requires slightly more cylinder to piston clearance). All part numbers utilize an application specific forging for a more efficient dome shape. These pistons are the perfect choice for your street Hemi engine. Valve pockets have been engineered to accommodate oversized valves and long duration, tight lobe separation cams. 4032 alloy pistons are precision CNC machined for 5/64, 5/64, 3/16 factory style rings. 2618 alloy pistons are CNC machined for 1/16, 1/16, 3/16 rings.

Includes:
Pin #031-2930-17-51S (175g)
Double spiro locks (#031-042-CS)

426 SERIES (4032 ALUMINUM ALLOY)
Std Bore: 4.250
Ring package designed for: 5/64, 5/64, 3/16 Rings
 Tech and Installation Tips
 Valve Relief Diagram
Part # Cubic
Inches		 Bore Stroke Rod
Length		 Block
Height		 Compression
Distance
Head Cubic Centimeters
168cc   174cc
Compression Ratio
Dome
Volume		 Gram
Weight		 Footnote Oversize
232517 528 4.500 4.150 6.860   1.795 10.4 - 10.0 62 900   0.250
131850 426 4.255 3.750 6.860   1.955 10.7 - 10.1 88 830   0.005
118758 431 4.280 3.750 6.860   1.955 10.8 - 10.2 88 829   0.030
118759 433 4.290 3.750 6.860   1.955 10.8 - 10.2 88 842   0.040

426 SERIES (2618 ALUMINUM)
Std Bore: 4.250
Ring package designed for: 1/16, 1/16, 3/16 Rings
Part # Cubic
Inches		 Bore Stroke Rod
Length		 Block
Height		 Compression
Distance
Head Cubic Centimeters
168cc   174cc
Compression Ratio
Dome
Volume		 Gram
Weight		 Footnote Oversize
131834 472 4.255 4.150 6.860   1.765 11.7 - 11.1 98 771   0.005


- Denotes part # has been issued a new part #. A list referencing old part #s to their new counterparts will be available shortly.

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