Red Roller Rockers for Big-Block Chevy 7/16 stud and W 348/409 1.7:1 (Qty 1)

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Edelbrock Part # 77791 Red Roller Rocker arms are designed for Big Block Chevy's using 7/16" studs. This 1.7:1 Ratio, single replacement rocker is manufactured in the USA from lightweight 7129 grade aluminum. The body is CNC machined then micro polished and anodized for durability. The trunnion race, roller pin and roller tip are centerless ground for superior quality. A high quality Torrington needle bearing fulcrum combined with a roller tip ensure smooth operation and performance. The full body design will accommodate up to 1.65" diameter springs. Thick-walled adjusting nuts and 4140 steel poly locks are included.

Documents & Installation Notes


Availability Available
Application Application Specific
UPC 00085347777914
Maximum Spring Outside Diameter 1.65 in
Maximum Spring Outside Diameter 1.65 in
Quantity Sold Individually
Self Aligning No
Rocker Arm Finish Red Anodized
Rocker Arm Nut Type Poly Lock
Rocker Arm Ratio 1.7:1
Rocker Arm Type Full Roller
Slot Width 1.484 in
Stud Thread Diameter 0.4375 in
Shims Included No
Availability Note Available to Order
Warranty 12 Months
Hazardous Materials Warning WARNING: This product can expose you to Chrome, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit
Installation Notes
  • Rocker geometry should be checked, making sure that the contact point of the roller remains properly on the valve tip and does not roll off the edge. Visual inspection of the rockers, valve springs, retainers, and pushrods should be made to ensure that none of these components come into improper contact with each other. If problems with valve train geometry occur, changes such as pushrod length may have to be made.
Material Aluminum
Mounting Type Stud