What is the advantage of a roller rocker arm?

Roller rocker arms, like this Edelbrock part, use a roller tip and bearing fulcrum to reduce friction. This can lead to smoother operation and potentially improved performance compared to traditional stamped steel rocker arms.

What does the 1.7:1 ratio mean?

The 1.7:1 ratio indicates how much the valve opens relative to the camshaft lobe lift. A higher ratio, like 1.7:1, will result in more valve lift than a stock ratio, which can help your engine breathe better.

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Specifications

Brand: Edelbrock
Part #: 77791

Edelbrock Rocker Arms Roller BBC 7/16In 1 7 1 Ratio Individual

Name: Edelbrock Rocker Arms Roller BBC 7/16In 1 7 1 Ratio Individual
Brand: Edelbrock
SKU: edelbrock-edelbrock-rocker-arms-roller-bbc-7-16in-1-7-1-ratio-individual-t14-128141
Price: 50.44 USD
Availability: BackOrder

$50.44

On Backorder

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Edelbrock Roller Rocker Arms for Big Block Chevy. Features a 1.7:1 ratio and 7/16in stud for improved valve lift.

Key Features

Fits Big Block Chevy engines using 7/16 inch studs.
Features a 1.7:1 ratio for increased valve lift.
Manufactured in the USA from lightweight 7129 grade aluminum.
CNC machined body with micro polish and anodizing for durability.
Includes a Torrington needle bearing fulcrum and roller tip for smooth operation.
Accommodates valve springs up to 1.65 inches in diameter.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

If you're rebuilding the top end of your Big Block Chevy and need to replace a single rocker arm, this Edelbrock roller rocker is a solid option. It's designed to work with 7/16 inch studs and offers a 1.7:1 ratio, which means it will increase your valve lift compared to a stock rocker arm. This can help your engine breathe a little better.

This rocker arm is made in the USA from lightweight 7129 grade aluminum. The body is CNC machined and then micro polished and anodized for better durability. It uses a Torrington needle bearing fulcrum and a roller tip to ensure smooth operation and reduce friction. The design can accommodate springs up to 1.65 inches in diameter, and it comes with thick-walled adjusting nuts and 4140 steel poly locks.