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302 INVERTED DOME

These pistons are designed to be compatible with forced induction and nitrous applications. The valve reliefs are machined to accommodate larger valves and long duration, tight lobe separation cams. Precision CNC machined ring grooves accept 1/16, 1/16, 3/16 rings. Part number 293082 features a full round dish.

Includes:
Pin #912-2750-14-51S (123g), note D
Pin #927-2750-15-51S (130g), note C
Double spiro locks (#927-042-CS)
Contact Reduction Grooves
Double pin oilers
302 SERIES
Std Bore: 4.000
Ring package designed for: 1/16, 1/16, 3/16 Rings

Click here to see matching JE Pro Seal Head Gaskets!

Tech and Installation Tips
Valve Relief Diagram
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
56cc 60cc 64cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
131656 306 4.030 3.000 5.090 8.190 1.600 9.3 8.8 8.4 -11.0 508 D,M 0.030 J10008-4030-5


302 STROKER
Std Bore: 4.000
Ring package designed for: 1/16, 1/16, 3/16 Rings

Click here to see matching JE Pro Seal Head Gaskets!
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
56cc 60cc 64cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
170847 345 4.020 3.400 5.400 8.200 1.100 9.1 8.8 8.5 -22.0 416 B,C 0.020 J10008-4020-5
314508 345 4.020 3.400 5.400 8.200 1.100 10.4 9.9 9.5 -10.1 Call B,C,M 0.020 J10008-4020-5
170848 347 4.030 3.400 5.400 8.200 1.100 9.1 8.8 8.5 -22.0 415 B,C 0.030 J10008-4030-5
314509 347 4.030 3.400 5.400 8.200 1.100 10.4 9.9 9.5 -10.5 Call B,C,M 0.030 J10008-4030-5
232462 348 4.040 3.400 5.400 8.200 1.100 9.6 8.8 8.5 -22.0 424 B,C 0.040 J100F8-4040-5
314510 348 4.040 3.400 5.400 8.200 1.100 10.4 9.9 9.5 -10.9 Call B,C,M 0.040 J10008-4040-5
293082 364 4.125 3.400 5.400 8.200 1.100 9.1 8.8 8.5 -26.0 460 B,C 0.125 J10008-4125-5
314511 364 4.125 3.400 5.400 8.200 1.100 10.4 9.9 9.5 -14.0 Call B,C,M 0.125 J10008-4125-5
314512 330 4.020 3.250 5.400 8.200 1.175 10.4 9.9 9.5 -6.5 Call B,C,M 0.020 J10008-4020-5
170850 331 4.030 3.250 5.400 8.200 1.175 8.4 8.1 7.8 -26.5 431 B,C,M 0.030 J10008-4030-5
314513 331 4.030 3.250 5.400 8.200 1.175 10.4 9.9 9.5 -6.8 Call B,C,M 0.030 J10008-4030-5
232463 348 4.040 3.250 5.400 8.200 1.175 8.8 8.5 8.2 -26.0 446 B,C,M 0.040 J100F8-4040-5
314514 333 4.040 3.250 5.400 8.200 1.175 10.4 9.9 9.5 -7.2 Call B,C,M 0.040 J10008-4040-5
314515 347 4.125 3.250 5.400 8.200 1.175 10.4 9.9 9.5 -10.2 Call B,C,M 0.125 J10008-4125-5


TWISTED SERIES
Std Bore: 4.000
Ring package designed for: 1/16, 1/16, 3/16 Rings

Click here to see matching JE Pro Seal Head Gaskets!
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
56cc 60cc 64cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
232470 347 4.030 3.400 5.400 8.200 1.100 10.4 9.9 9.5 -11.0 430 B,C,M 0.030 J10008-4030-5
232471 331 4.030 3.250 5.400 8.200 1.175 9.9 9.5 9.1 -11.0 439 B,C,M 0.030 J10008-4030-5

- 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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