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LS2 / LS3 / LS6 / L92: Flat Top 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
  • Compatible with GM L92 Cylinder Heads
  • 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
LS2 / LS3 / LS6 / L92: Flat Top Professional Series
Std Bore: 4.000 (LS2/LS6), 4.065 (LS3)
Ring package designed for: 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
64cc 66cc 72cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
329370 402 4.000 4.000 6.125 9.240 1.115 11.6 11.3 10.6 -5 384 B .005 JG3108-4010-4
279585 403 4.005 4.000 6.125 9.240 1.115 11.6 11.3 10.6 -5 385 B 0.005
329371 404 4.010 4.000 6.125 9.240 1.115 11.6 11.3 10.6 -5 390 B .010 JG3108-4010-4
279586 408 4.030 4.000 6.125 9.240 1.115 11.7 11.5 10.7 -5 393 B 0.030
279587 416 4.065 4.000 6.125 9.240 1.115 11.9 11.6 10.9 -5 404 B STD LS3
279589 416 4.070 4.000 6.125 9.240 1.115 12.0 11.7 10.9 -5 405 B .005 LS3
329372 417 4.075 4.000 6.125 9.240 1.115 12.0 11.7 10.9 -5 407 B .010 LS3 JG31F8-4075-5
298766 418 4.080 4.000 6.125 9.240 1.115 12.0 11.7 10.9 -5 410 .015 LS3
326279 419 4.085 4.000 6.125 9.240 1.115 12.0 11.7 10.9 -5 413 M .020 LS3 J75008-4080-5
329375 364 4.000 3.622 6.098 9.249 1.340 10.5 10.3 9.7 -5 420 K STD JG3108-4000-7
329373 364 4.000 3.622 6.125 9.251 1.315 10.6 10.4 9.7 -5 415 M STD JG3108-4000-7
279590 365 4.005 3.622 6.125 9.240 1.315 10.6 10.4 9.7 -5 417 0.005
329376 365 4.005 3.622 6.098 9.249 1.340 10.6 10.3 9.7 -5 423 K .005 JG3108-4000-7
329377 366 4.010 3.622 6.098 9.249 1.340 10.6 10.4 9.7 -5 425 K,M .010 JG3108-4010-4
329374 366 4.010 3.622 6.125 9.251 1.315 10.6 10.4 9.8 -5 420 M .010 JG3108-4010-4
279591 370 4.030 3.622 6.125 9.240 1.315 10.7 10.4 9.8 -5 426 0.060
329378 370 4.030 3.622 6.098 9.249 1.340 10.7 10.4 9.8 -5 431 K,M .030 JG31F8-4030-2
329379 376 4.065 3.622 6.098 9.249 1.340 10.8 10.6 9.9 -5 438 K STD LS3 JG31F8-4070-0
279592 376 4.065 3.622 6.125 9.240 1.315 10.9 10.6 10.0 -5 440 M STD LS3
279593 377 4.070 3.622 6.125 9.240 1.315 10.9 10.6 10.0 -5 439 .005 LS3
298616 377 4.070 3.622 6.098 9.240 1.340 10.9 10.6 10.0 -5 445 K .005 LS3 JG31F8-4070-0
325258 378 4.075 3.622 6.125 9.240 1.315 10.9 10.6 10.0 -5 443 M .010 LS3 JG31F8-4075-5
329380 378 4.075 3.622 6.098 9.249 1.340 10.9 10.6 10.0 -5 443 K,M .010 LS3 JG31F8-4075-5
325259 379 4.080 3.622 6.125 9.240 1.315 10.9 10.7 10.0 -5 447 M .015 LS3 JG31F8-4075-5
298617 379 4.080 3.622 6.098 9.240 1.340 10.9 10.6 10.0 -5 440 K .015 LS3

- 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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