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)
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426 SERIES (4032 ALUMINUM ALLOY)
Std Bore: 4.250
Ring package designed for: 5/64, 5/64, 3/16 Rings
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| Part # |
CID |
Bore |
Stroke |
Rod
Lgth. |
Block
Ht. |
Comp.
Ht. |
| Head Cubic Centimeters |
| 168cc |
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174cc |
| Compression Ratio |
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Dome
Vol. |
Gram
Wt. |
Footnote |
Oversize |
Recom.
Ring Set |
 |
| 232517 |
528 |
4.500 |
4.150 |
6.860 |
10.730 |
1.795 |
10.4 |
- |
10.0 |
62.0 |
884 |
M |
0.250 |
J10008-4500-5 |
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| 131850 |
426 |
4.255 |
3.750 |
6.860 |
10.690 |
1.955 |
10.7 |
- |
10.1 |
88.0 |
830 |
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0.005 |
JP00F8-4250-5 |
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| 118758 |
431 |
4.280 |
3.750 |
6.860 |
10.690 |
1.955 |
10.8 |
- |
10.2 |
88.0 |
817 |
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0.030 |
JP00F8-4280-5 |
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| 118759 |
433 |
4.290 |
3.750 |
6.860 |
10.690 |
1.955 |
10.8 |
- |
10.2 |
88.0 |
848 |
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0.040 |
JP00F8-4290-5 |
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426 SERIES (2618 ALUMINUM)
Std Bore: 4.250
Ring package designed for: 1/16, 1/16, 3/16 Rings
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| Part # |
CID |
Bore |
Stroke |
Rod
Lgth. |
Block
Ht. |
Comp.
Ht. |
| Head Cubic Centimeters |
| 168cc |
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174cc |
| Compression Ratio |
|
Dome
Vol. |
Gram
Wt. |
Footnote |
Oversize |
Recom.
Ring Set |
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| 131834 |
472 |
4.255 |
4.150 |
6.860 |
10.700 |
1.765 |
11.7 |
- |
11.1 |
98.0 |
777 |
M |
0.005 |
J10008-4250-5 |
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Tech and Installation Tips
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Valve Relief Diagram
- Denotes part # has been issued a new part #. A list referencing old part #s to their new counterparts will be available shortly.