Product Summary

Roller Tip Rocker Arm Style, 1.6:1 Rocker Arm Ratio

  • 1.6 Ratio 3/8 Stud
  • Ball Mount Style
  • Non-Self Aligning Style
  • Fits Small Block Chevy Engines Cylinder Heads
  • PROFORM Parts Brand Product
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Key Specs

MFG. Part #66922C
Rocker Arm StyleRoller Tip
Rocker Arm Ratio1.6:1
Stud Size.375"
Material TypeSteel
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Need To Know

Quick and Easy Returns

Return Policy

Proform 66922C Details

We completely overhauled the design of these rockers to make an overall better product.

A super affordable way to reduce internal valve train friction and valve stem wear. Extra long slot eliminates rocker to stud interference when using high lift cams. 16 rockers, anti-gall grooved balls and nuts per package.

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Proform 66922C Specifications

KEY SPECS
MFG. Part #66922C
BrandProform
Rocker Arm StyleRoller Tip
Rocker Arm Ratio1.6:1
Stud Size.375"
Material TypeSteel
GENERAL
Stud Diameter0.38"

Questions & Answers

1 Question • 1 Answer

Will these work on a vortec SBC out of a 98 truck? Will they bolt right in or will I need guid plates or custom length push rods? Will they cause any drivability issues or require a special tune?

by Adam

• 3 months ago

1 answer

1 of 1 questions shown

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