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Big Block Chevy Roller Rocker Kit with 1.7 Ratio & 7/16" Stud with Valve Lash Wrench
InfoVehicle Info Needed
PROFORMPART NUMBER: 778-66913K

Big Block Chevy Roller Rocker Kit with 1.7 Ratio & 7/16" Stud with Valve Lash Wrench

$26198
ShippingShips on Oct 23, 2026
Lowest PriceLowest Price Guarantee
Currently Unavailable

This product is currently not available. Please call customer service for assistance at 1-800-345-4545.

Chevy Big Block
    Big Block Chevy Roller Rocker Kit
  • 1.7 Ratio
  • 7/16" Stud
  • 16/pkg
    Includes:
  • Roller Rockers
  • 5/8" Valve Lash Wrench

    Kit Includes
  • Proform 1.7 Ratio Roller Rockers (16/pkg) - 778-66913
  • Proform 5/8 Valve Lash Adjusting Tool - 778-66781

    Reduce Valvetrain Wear With Roller Rockers

    One of the best ways to rid an engine of internal friction is with a set of aluminum roller rocker arms. Proform's race-proven roller tips unleash horsepower, eliminate valve stem tip wear and tear, and extend valvetrain component life. These aluminum roller rockers are precisely machined to ensure ratio accuracy and consistency.

Part TypeRocker Arm
Product LineProform Aluminum Roller Rocker Arms
BrandPROFORM
Part CategoryPerformance Parts
Arm FinishBlue anodized
Rocker Arm Ratio1.7
Includes ShimsNO
Shims IncludedNo
PositionN/A
Maximum Spring Diameter1.5 in (38.1 mm)
Stud Size 0.4375
Nut StylePolylock
Rocker Arm Nut StylePolylock
QuantitySold as a set of 16
Valve Adjusting Wrench MaterialStainless steel
Rocker Arm Mounting StyleStud
Engine Make/SizeChevy Big Block (396-454)
Self-AligningNo
Rocker Arm StyleFull roller
Valve Adjusting Wrench Size0.625 in (15.9 mm)
Valve Adjusting Wrench FinishNatural
Rocker Arm Body StyleStandard
T-Handles IncludedYes
Arm MaterialAluminum
T-Handle Sizes0.219 in (5.6 mm)
Ratio1.7
Slot Width0.6 in (15.2 mm)
Package Qty1
Package TypeEA
No Questions
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Some parts are not legal for use in California or other states with similar laws / regulations
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