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Proform Parts 66913C Aluminum Roller Rocker Arms 1.7 Ratio 7/16 Stud BB Chevy

(Chevrolet Camaro 1967-72, Corvette 1965-74, Impala 1965-76, Malibu 1965-67, 1973-75, C1500 1990-93, Chevelle 1965-73, Blazer 1973-74 + 101 more models)

Manufacturer

Picture for manufacturer Proform Parts

Part Number

66913C
7 reviews
Sale Price

$254.31

1 left at this price

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Usually delivered within 2 days

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Product Details

The Proform Parts 66913C roller rocker arm set delivers race-proven performance for big block Chevy engines. These extruded aluminum rocker arms feature a 1.7:1 ratio and are designed to fit 7/16-inch studs, providing increased valve lift for improved engine breathing and power output.

Key Features:

  • Full needle bearing fulcrum and roller tip design reduces friction and extends valve train component life
  • Extruded aluminum construction offers excellent strength-to-weight ratio
  • Precision machined for consistent and accurate rocker ratio across all cylinders
  • Roller tip virtually eliminates valve stem wear and side loading
  • 1.7:1 ratio increases valve lift without changing camshaft profiles
  • Fits big block Chevrolet engines with 7/16-inch rocker studs

These roller rocker arms are an excellent upgrade for street performance and racing applications where reduced friction, increased durability, and higher RPM capability are essential. The needle bearing design and roller tip work together to minimize parasitic power loss while protecting critical valve train components.

Products specifications

Fits

Chevrolet Camaro 1967-72, Corvette 1965-74, Impala 1965-76, Malibu 1965-67, 1973-75, C1500 1990-93, Chevelle 1965-73, Blazer 1973-74, C10 Pickup 1968-74, Caprice 1966-76, C10 1975-80, El Camino 1966-75, Monte Carlo 1970-75 + 96 more models

Notes

Clamshell package.

Quantity

Sold as a set of 16.

Rocker Arm Body Style

Standard

Rocker Arm Finish

Blue anodized

Rocker Arm Mounting Style

Stud

Rocker Arm Nut Style

Polylock

Rocker Arm Style

Full roller

Self-Aligning

No

Shims Included

No

Stud Size

7/16 in.

Ratio

1.7

Finish

Blue Anodized

Make

Chevrolet

Fasteners Included

Yes

Material

Extruded Aluminum

Engine

Chevy Big Block

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Great

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