Forged from 2618 or 4032 alloy, Premium series include all of the features of FHR pistons with the addition of precision, CNC-machined valve reliefs and crown, pressure fed oiling, and skirt and pin boss struts for added durability. Pistons listed accept 1/16" (top), 1/16" (second), and 3/16" (oil) rings unless noted. Sets of eight include wrist pins and spiral locks
- Piston Head Type:
- Dish
- Bore (in.):
- 4.350
- Bore (mm):
- 110.490mm
- Recommended Stroke (in.):
- 4.250 in.
- Piston Style:
- Step head, with two valve reliefs
- Compression Height (in.):
- 1.485 in.
- Piston Volume (cc.):
- -26.7
- Piston Material:
- Forged aluminum
- Piston Avg Weight (g.):
- 592
- Piston Ring Thickness:
- 1/16 in. x 1/16 in. x 3/16 in.
- Quantity:
- Sold as a set of 8.
- Notes:
- Step dish design. 505 cubic inch. 10.725 inch deck height. Big Block Chevrolet style wrist pin.
- Wrist Pin Included:
- Yes
- Wrist Pin Style:
- Press-fit or floating
- Piston Pin Diameter (in.):
- 0.990 in.
- Wrist Pin Retainers Included:
- Yes
- Piston Pin Wall Thickness:
- N/A
- Piston Pin Material:
- N/A
- Piston Rings Included:
- No
- File Fit:
- N/A
- Gas Ported:
- N/A
- Gapless:
- N/A
- Make:
- Mopar
- Engine Family:
- Mopar big block RB
- Engine Sizes:
- 7.2L/440
- Years:
- 1966-1979
- Cylinder Head:
- Stock
- Recommended Rod Length:
- 7.100 in.
- Compression:
- 75cc: 10.3, 78cc: 10, 88cc: 9.3
