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23º 400 F.S.R HOLLOW DOME GP (GAS PORTED)

23º 350 & 400 F.S.R. HOLLOW DOME GP (GAS PORTED) New FSR version of our popular 23º domed pistons are ideal for circle track and drag racing. Up to 70 grams lighter than traditional full round (including wrist pin and rings), but stronger and more durable due to modern FEA-designed forging. Deeper valve pockets to accommodate higher lift cams and milled cylinder heads. Accepts low friction .043/.043/3.0mm ring package.

Includes:
Accumulator Groove
Contact Reduction Grooves
Double Pin Oilers
Lateral gas ports
Pin #927-2250-15-51C (106g)
Wire Locks #927-073-MW
23° 350 F.S.R HOLLOW DOME GP (GAS PORTED)
350 Series
Std Bore: 4.000
Ring package designed for: .043, .043, 3MM 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
58cc 64cc 76cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
322535 377 4.000 3.750 6.000 9.000 1.125 14.8 13.5 11.5 11.0 418 B,M STD JG7708-4000-5
322536 381 4.020 3.750 6.000 9.000 1.125 14.9 13.6 11.6 11.0 422 B,M 0.020 JG7708-4020-5
322537 383 4.030 3.750 6.000 9.000 1.125 15.0 13.6 11.6 11.0 424 B,M 0.030 JG77F8-4030-5
322538 384 4.035 3.750 6.000 9.000 1.125 15.0 13.7 11.6 11.0 426 B,M 0.035 JG77F8-4030-5
322539 385 4.040 3.750 6.000 9.000 1.125 15.1 13.7 11.6 11.0 428 B,M 0.040 JG77F8-4040-5
322540 388 4.060 3.750 6.000 9.000 1.125 15.2 13.8 11.7 11.0 432 B,M 0.060 J714F8-4060-5
322529 352 4.000 3.500 6.000 9.000 1.250 14.5 13.1 11.1 13.5 438 A,M STD JG7708-4000-5
322530 355 4.020 3.500 6.000 9.000 1.250 14.6 13.2 11.2 13.5 444 A,M 0.020 JG7708-4020-5
322531 357 4.030 3.500 6.000 9.000 1.250 14.7 13.3 11.3 13.5 447 A,M 0.030 JG77F8-4030-5
322532 358 4.035 3.500 6.000 9.000 1.250 14.7 13.4 11.3 13.5 449 A,M 0.035 J714F8-4030-5
322533 359 4.040 3.500 6.000 9.000 1.250 14.8 13.4 11.3 13.5 460 A,M 0.040 JG77F8-4040-5
322534 362 4.060 3.500 6.000 9.000 1.250 14.9 13.5 11.4 13.5 416 A,M 0.060 JG77F8-4060-5


23º 400 F.S.R HOLLOW DOME GP (GAS PORTED)
400 Series
Std Bore: 4.125
Ring package designed for: .043, .043, 3MM Rings
1.000" Compression height pistons not intended for nitrous use.

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
58cc 64cc 76cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
301426 428 4.125 4.000 6.000 9.000 1.000 16.5 15.0 12.7 10.8 406 B STD J71408-4125-5
301427 432 4.145 4.000 6.000 9.000 1.000 16.6 15.1 12.8 10.8 412 B .020 J71408-4145-5
301428 434 4.155 4.000 6.000 9.000 1.000 16.7 15.2 12.9 10.8 414 B .030 J71408-4155-5
301429 436 4.165 4.000 6.000 9.000 1.000 16.8 15.2 12.9 10.8 417 B .040 J71408-4165-5
301458 440 4.185 4.000 6.000 9.000 1.000 16.9 15.3 13.0 10.8 423 B .060 J71408-4185-5
301445 414 4.125 3.875 6.000 9.000 1.062 16.0 14.6 12.4 10.8 411 B STD J71408-4125-5
301447 417 4.130 3.875 6.000 9.000 1.062 16.0 14.6 12.4 10.8 410 B .005 J71408-4130-5
301448 418 4.145 3.875 6.000 9.000 1.062 16.1 14.7 12.5 10.8 418 B .020 J71408-4145-5
301450 420 4.155 3.875 6.000 9.000 1.062 16.1 14.7 12.5 10.8 419 B .030 J71408-4155-5
301451 422 4.165 3.875 6.000 9.000 1.062 16.2 14.8 12.6 10.8 CALL B .040 J71408-4165-5
301453 426 4.185 3.875 6.000 9.000 1.062 16.3 14.9 12.7 10.8 427 B .060 J71408-4185-5
301463 406 4.125 3.800 6.000 9.000 1.100 15.7 14.3 12.2 10.8 420 STD J70108-4125-5
301464 410 4.145 3.800 6.000 9.000 1.100 15.8 14.4 12.3 10.8 425 .020 J71408-4145-5
301465 412 4.155 3.800 6.000 9.000 1.100 15.9 14.5 12.4 10.8 428 .030 J71408-4155-5
301466 414 4.165 3.800 6.000 9.000 1.100 16.0 14.6 12.5 10.8 430 .040 J71408-4165-5
301475 401 4.125 3.750 6.000 9.000 1.125 15.5 14.1 12.0 10.8 425 STD J71408-4125-5
322561 401 4.125 3.750 6.000 9.000 1.125 16.1 14.6 12.3 13.0 430 M STD JG7708-4125-5
301476 402 4.130 3.750 6.000 9.000 1.125 15.5 14.1 12.0 10.8 425 .005 J71408-4130-5
322562 402 4.130 3.750 6.000 9.000 1.125 16.1 14.6 12.4 13.0 432 M .005 JG7708-4130-5
301477 405 4.145 3.750 6.000 9.000 1.125 15.6 14.2 12.1 10.8 429 .020 J71408-4145-5
322563 405 4.145 3.750 6.000 9.000 1.125 16.2 14.7 12.4 13.0 434 M .020 JG7708-4145-5
301478 407 4.155 3.750 6.000 9.000 1.125 15.7 14.3 12.2 10.8 431 .030 J71408-4155-5
322564 407 4.155 3.750 6.000 9.000 1.125 16.3 14.8 12.5 13.0 437 M .030 JG7708-4155-5
301479 409 4.165 3.750 6.000 9.000 1.125 15.7 14.3 12.2 10.8 434 .040 J71408-4165-5
322565 409 4.165 3.750 6.000 9.000 1.125 16.3 14.8 12.5 13.0 439 M .040 JG7708-4165-5

- 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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