The next design in the evolution of steel stud mount rocker arms, Ultra Pro Magnum XD rockers offer increased strength and unsurpassed durability. Rocker arms are made of 8650 steel with super accurate ratios, billet pushrod seat inserts, precision-sorted needle bearings and hardened roller tips. Compatible with most diameter valve springs and retainers. Covered by a lifetime guarantee against breakage. Sold in sets of 16
- Rocker Arm Mounting Style:
- Stud
- Self-Aligning:
- No
- Rocker Arm Ratio:
- 1.70
- Rocker Arm Style:
- Full roller
- Stud Size:
- 7/16 in.
- Shims Included:
- No
- Rocker Arm Material:
- Chromoly steel
- Rocker Arm Body Style:
- Standard
- Rocker Arm Fasteners Included:
- Yes
- Rocker Arm Nut Style:
- Polylock
- Maximum Spring Diameter (in.):
- N/A
- Finish:
- Black oxide
- Quantity:
- Sold as a set of 16.
- Make:
- Chevrolet
- Engine Family:
- Chevy big block Mark IV
- Engine Sizes:
- 6.5L/396-7.4L/454
- Years:
- 1966-1990
- Engine Family:
- Chevy big block Gen V
- Engine Sizes:
- 7.4L/454
- Years:
- 1991-1995
- Engine Family:
- Chevy big block Gen VI
- Years:
- 1996-2000
