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302/351 BIG BORE DOME

All new small-block Ford dome pistons, available in large bore sizes to accommodate new aftermarket race blocks. These pistons will fit most aftermarket and factory heads. Cleveland and TFS Twisted Wedge heads will require custom pistons. Precision CNC machined ring grooves accept 1/16, 1/16, 3/16 rings.

Includes:
Pin #927-2750-15-51S (130g)
Double spiro locks (#927-042-CS)
Double pin oilers
302 8.200" DART/SVO BLOCK
Std Bore: 4.125
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
232475 364 4.125 3.400 5.400 8.200 1.100 13.6 12.8 12.1 6.5 432 B,S STD J10008-4125-5
338254 365 4.135 3.400 5.400 8.200 1.100 13.7 12.9 12.2 6.5 NEW B,S,M 0.010 J100F8-4135-5
338255 367 4.145 3.400 5.400 8.200 1.100 13.7 12.9 12.2 6.5 NEW B,S,M 0.020 J100F8-4145-5
338256 369 4.155 3.400 5.400 8.200 1.100 13.8 13.0 12.3 6.5 NEW B,S,M 0.030 J100F8-4155-5
232477 347 4.125 3.250 5.400 8.200 1.175 13.1 12.3 11.6 6.5 420 B,S,M STD J10008-4125-5
207416 331 4.125 3.100 5.400 8.180 1.230 12.5 11.8 11.1 6.5 449 STD J10008-4125-5
338250 333 4.135 3.100 5.400 8.180 1.230 12.5 11.8 11.1 6.5 NEW M 0.010 J100F8-4135-5
338251 335 4.145 3.100 5.400 8.180 1.230 12.6 11.9 11.2 6.5 NEW M 0.020 J100F8-4145-5
338252 336 4.155 3.100 5.400 8.180 1.230 12.6 11.9 11.2 6.5 NEW M 0.030 J100F8-4155-5


351 9.500" DART/SVO BLOCK
Std Bore: 4.125 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
207416 438 4.125 4.100 6.200 9.480 1.230 16.2 15.3 14.4 6.5 449 STD J10008-4125-5
338250 440 4.135 4.100 6.200 9.480 1.230 16.2 15.3 14.4 6.5 NEW M 0.010 J100F8-4135-5
338251 443 4.145 4.100 6.200 9.480 1.230 16.3 15.4 14.5 6.5 NEW M 0.020 J100F8-4145-5
338252 445 4.155 4.100 6.200 9.480 1.230 16.4 15.5 14.6 6.5 NEW M 0.030 J100F8-4155-5
207416 427 4.125 4.000 6.250 9.480 1.230 15.9 14.9 14.1 6.5 449 STD J10008-4125-5
232476 428 4.125 4.000 6.200 9.480 1.280 15.9 14.9 14.1 6.5 464 S STD J10008-4125-5
338250 430 4.135 4.000 6.250 9.480 1.230 16.0 15.0 14.2 6.5 NEW M 0.010 J100F8-4135-5
338251 432 4.145 4.000 6.250 9.480 1.230 16.0 15.0 14.2 6.5 NEW M 0.020 J100F8-4145-5
338252 434 4.155 4.000 6.250 9.480 1.230 16.1 15.1 14.3 6.5 NEW M 0.030 J100F8-4155-5

- 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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