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Pontiac 400/428/455 Flat Top

  • 4032 low expansion high silicon aluminum alloy heat treated to SRP specifications
  • Forced Pin Oiler for increased wrist pin lubrication
  • Pin fitting and double spiro locks included
  • 980-2750-150 wall wrist pin (135g) included
  • CNC Machined ring grooves accept 1/16, 1/16, 3/16 rings (Rings Sold Seperately)
400 Flat Top
Std Bore: 4.120
Ring package designed for: 1/16, 1/16, 3/16 Rings

Tech and Installation Tips
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
72cc 80cc 84cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
196831 461 4.155 4.250 6.800 10.210 1.285 11.9 11.0 10.6 -5cc 446 B,E 0.035 S100S8-4155-5
196830 468 4.185 4.250 6.800 10.210 1.285 12.1 11.1 10.7 -5cc 462 B,E 0.065 J100F8-4185-5
151792 458 4.160 4.210 6.625 10.210 1.480 11.8 10.9 10.5 -5cc 495 0.040 S100S8-4155-5
153983 407 4.160 3.750 6.625 10.190 1.690 10.9 10.3 9.4 -5cc 520 0.040 S100S8-4155-5


428 Flat Top
Std Bore: 4.120
Ring package designed for: 1/16, 1/16, 3/16 Rings
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
72cc 80cc 84cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
156431 435 4.160 4.000 6.625 10.215 1.590 11.3 10.4 10.0 -5cc 515 M 0.040 S100S8-4155-5
146508 440 4.188 4.000 6.625 10.215 1.590 11.6 11.0 10.0 -5cc 519 0.068 J100F8-4185-5


455 Flat Top
Std Bore: 4.151
Ring package designed for: 1/16, 1/16, 3/16 Rings
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
72cc 80cc 84cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
196831 461 4.155 4.250 6.800 10.210 1.285 11.9 11.0 10.6 -5cc 446 B,E .004 S100S8-4155-5
196830 468 4.185 4.250 6.800 10.210 1.285 12.1 11.1 10.7 -5cc 462 B,E .034 J100F8-4185-5
151792 458 4.160 4.210 6.625 10.210 1.480 11.8 10.9 10.5 -5cc 495 .009 S100S8-4155-5
149721 463 4.185 4.210 6.625 10.210 1.480 12.2 11.5 10.5 -5cc 501 0.034 J100F8-4185-5

- 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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