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350 / 400 SMALL BLOCK DOME PROFESSIONAL SERIES

    PISTON DESIGN
  • Advanced, lightweight FSR forging that eliminates stress concentrations for superior strength
  • Up to 20% lighter than traditional equivalent
  • High-silicon 4032 aluminum alloy for reduced piston-to-wall clearance and quiet operation
  • Accumulator grooves for improved ring seal
  • Designed for normally aspirated or moderate forced induction/nitrous applications
  • Now includes high performance skirt coating!
    RINGS INCLUDED
  • Lightweight, low friction metric ring package included
  • 1.2mm top ring, 1.5mm 2nd ring, 3.0mm standard tension oil ring
  • Minimal filing required

    PINS AND LOCKS
  • High quality 2.250" pin further reduces reciprocating weight
  • Carbon steel wire locks included
350 SMALL BLOCK DOME PROFESSIONAL SERIES
Std Bore: 4.000
Ring package: 1.2mm, 1.5mm, 3.0mm Premium Rings Included

Click here to see matching JE Pro Seal Head Gaskets!
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
58cc 64cc 70cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
295443 377 4.000 3.750 6.000 9.000 1.125 13.9 12.7 11.7 7 411 B STD JG31F8-4000-7
329450 378 4.005 3.750 6.000 9.000 1.125 13.9 12.7 11.8 7 412 B,M .005 JG3108-4000-7
329451 379 4.010 3.750 6.000 9.000 1.125 13.9 12.8 11.8 7 413 B,M .010 JG3108-4010-4
329452 381 4.020 3.750 6.000 9.000 1.125 14.0 12.8 11.8 7 415 B,M .020 JG3108-4020-2
271058 383 4.030 3.750 6.000 9.000 1.125 14.1 12.9 11.9 7 416 B 0.030
271059 383 4.030 3.750 5.850 8.990 1.260 14.7 13.4 12.3 11 442 0.030
279483 385 4.040 3.750 6.000 9.000 1.125 14.1 12.9 11.9 7 415 B 0.040
329453 388 4.060 3.750 6.000 9.000 1.125 14.2 13.0 12.0 7 420 B .060 JG3F48-4060-0
295443 357 4.000 3.480 6.125 8.990 1.125 13.0 11.9 11.0 7 411 B STD JG31F8-4000-7
329454 350 4.000 3.480 6.000 9.000 1.260 13.8 12.6 11.5 11 436 A,M STD JG3108-4000-7
329450 351 4.005 3.480 6.125 8.990 1.125 13.0 11.9 11.0 7 412 A,B .005 JG3108-4000-7
329455 351 4.005 3.480 6.000 9.000 1.260 13.8 12.6 11.5 11 437 A,M .005 JG3108-4000-7
329451 352 4.010 3.480 6.125 8.990 1.125 13.0 11.9 11.0 7 413 A,B .010 JG3108-4010-4
329456 352 4.010 3.480 6.000 9.000 1.260 13.9 12.6 11.6 11 438 A,M .010 JG3108-4010-4
329452 353 4.020 3.480 6.125 8.990 1.125 13.0 11.9 11.0 7 414 A,B .020 JG3108-4020-2
329457 353 4.020 3.480 6.000 9.000 1.260 13.9 12.7 11.6 11 440 A .020 JG3108-4020-2
271058 355 4.030 3.480 6.125 8.990 1.125 13.1 12.0 11.1 7 416 A,B 0.030
271059 355 4.030 3.480 6.000 9.000 1.260 14.0 12.7 11.7 11 442 A 0.030
279483 357 4.040 3.480 6.125 8.990 1.125 13.2 12.1 11.2 7 415 A,B 0.040
329458 357 4.040 3.480 6.000 9.000 1.260 14.0 12.8 11.7 11 445 A .040 JG31F8-4040-2
329453 360 4.060 3.480 6.125 8.990 1.125 13.3 12.1 11.2 7 420 A,B .060 JG31F8-4060-0
329459 360 4.060 3.480 6.000 9.000 1.260 14.1 12.9 11.8 11 453 A .060 JG31F8-4060-0


400 SMALL BLOCK DOME PROFESSIONAL SERIES
Std Bore: 4.125
Ring package: 1.2mm, 1.5mm, 3.0mm Premium Rings Included

Click here to see matching JE Pro Seal Head Gaskets!
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
58cc 64cc 70cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
310182 401 4.125 3.750 6.000 9.000 1.125 14.0 12.8 11.9 4 417 B STD JG31F8-4125-2
329446 402 4.130 3.750 6.000 9.000 1.125 14.0 12.8 11.9 4 419 B,M .005 JG31F8-4135-2
329447 403 4.135 3.750 6.000 9.000 1.125 14.0 12.9 11.9 4 422 B,M .010 JG31F8-4135-2
271066 406 4.155 3.750 6.000 9.000 1.125 14.1 13.0 12.0 4 424 B 0.030
310182 372 4.125 3.480 6.125 8.990 1.125 13.0 12.0 11.1 4 417 A,B STD JG31F8-4125-2
329446 373 4.130 3.480 6.125 8.990 1.125 13.0 12.0 11.1 4 419 A,B,M .005 JG31F8-4135-2
329447 374 4.135 3.480 6.125 8.990 1.125 13.0 12.0 11.1 4 422 A,B,M .010 JG31F8-4135-2
271066 377 4.155 3.480 6.125 8.990 1.125 13.2 12.1 11.2 4 424 A,B 0.030

- 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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