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Aluminum Roller Rockers for Big Block Chevy with 1.7 Ratio & 7/16" Stud
InfoVehicle Info Needed
PROFORMPART NUMBER: 778-66913

Aluminum Roller Rockers for Big Block Chevy with 1.7 Ratio & 7/16" Stud

$22999
ShippingShips on Oct 22, 2026
Lowest PriceLowest Price Guarantee
Currently Unavailable

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

Best Value
Aluminum Roller Rocker Arms for Big Block Chevy [1.7 Ratio, 7/16 in. Stud]

555-20985

Aluminum Roller Rocker Arms for Big Block Chevy [1.7 Ratio, 7/16 in. Stud]

$38699

Chevy Big Block
    Aluminum Roller Rockers
  • Big Block Chevy
  • 1.7 Ratio
  • 7/16" Stud
  • 16/pkg

  • Rated for up to 450 lbs of Open Load Pressure
  • Precision machined
  • Lengthen Valve Train Component Life
  • Reduce Wear On Valve Stem Tips
Part TypeRocker Arm
BrandPROFORM
Package Height2.1
Package Width9.4
Package Length14.4
Weight8.1 PG
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
Rocker Arm Mounting StyleStud
Engine Make/SizeChevy Big Block (396-454)
Self-AligningNo
Rocker Arm StyleFull roller
Rocker Arm Body StyleStandard
Arm MaterialAluminum
Ratio1.7
Part FitmentSemi Universal
Slot Width0.6 in (15.2 mm)
Vendor Part Number66913
Package Qty1
Package TypeEA
No Questions
No Reviews

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Some parts are not legal for use in California or other states with similar laws / regulations
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