SMALL BLOCK CHEVY
BIG BLOCK CHEVY
FORD
MOPAR
PONTIAC
HONDA/ACURA
427 OPEN CHAMBER

  • APBA® Approved.
  • Forged from Premium 2618 aluminum alloy
  • CNC machined domes with radiused valve reliefs provide optimum flame travel
  • Forced Pin Oiler for increased wrist pin lubrication
  • Pin fitting and double spiro locks included
  • 990-2930-150 wall wrist pin (150 grams) included
  • CNC Machined ring grooves accept 1/16, 1/16, 3/16 rings (Rings Sold Seperately)

427 Open Chamber
Std Bore: 4.250
Ring package designed for: 1/16, 1/16, 3/16 Rings
 Tech and Installation Tips
Part # Cubic
Inches		 Bore Stroke Rod
Length		 Compression
Distance
Head Cubic Centimeters
112cc 118cc 124cc
Compression Ratio
Dome
Volume		 Gram
Weight		 Footnote Oversize Ring Set#
158830 433 4.280 3.760 6.135 1.765 13.0 12.1 11.3 48cc 699 0.030 S100S8-4280-5
162840 439 4.310 3.760 6.135 1.765 13.1 12.2 11.4 48cc 717 0.060 S1S00S8-4310-5


- 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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