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BIG BLOCK 427 APBA DOME

Designed specifically for use with APBA-approved Dart Pro-1 cylinder heads, these pistons laser engraved with the APBA logo and part number.

Includes:
Pin # 990-2930-15-51S (150g)
Double Spiro Locks (# 990-042-CS)
Double Pin Oilers
Accumulator Grooves
BBC 427 APBA
Std Bore: 4.250
Ring package designed for: 1/16, 1/16, 3/16 Rings For custom bore sizes between 4.250" and 4.310", order part number 302556. This part number is made-to-order and priced as a custom piston. Please contact our tech line for price & lead time.

Tech and Installation Tips
Valve Relief Diagram
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
112cc 118cc 124cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
302556 3.766 6.135 9.783 1.765 50.0 M
262808 427 4.250 3.766 6.135 9.783 1.765 13.2 12.2 11.4 50.0 700 STD J100F8-4250-5
262809 433 4.280 3.766 6.135 9.783 1.765 13.3 12.4 11.6 50.0 685 M 0.030 J100F8-4280-5
265366 440 4.310 3.766 6.135 9.783 1.765 13.5 12.5 11.7 50.0 702 0.060 J100F8-4310-5


GM HEAD
Std Bore: 4.250
Ring packaged designed for: 1/16, 1/16, 3/16 Rings
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
110cc 118cc 124cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
267207 433 4.280 3.766 6.135 9.780 1.765 13.3 12.4 11.6 50.0 700 M .030 J100F8-4280-5
267208 440 4.310 3.766 6.135 9.780 1.765 13.5 12.5 11.7 50.0 685 M .060 J100F8-4310-5

- 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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