Product Summary

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

  • Features a 4340 steel rocker body for added durability
  • Makes an excellent replacement for stock or sportsman engines
  • Will eliminate noise & slop associated with worn or high mileage rockers
  • Kit includes all necessary polylocks and grooved balls
  • The roller tip minimizes scrubbing (the result of the valve stem pushing hard against the valve guide)
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Key Specs

MFG. Part #57583521
Rocker Arm StyleRoller Tip
Rocker Arm Ratio1.6:1
Stud Size.4375"
Material TypeSteel
See more specs

Need To Know

Quick and Easy Returns

Return Policy

Speedway Motors 57583521 Details

If your class or budget does not allow aluminum or stainless roller rocker arms, check out these steel roller tip rockers. Made from 4340 heat treated chromoly steel, they feature a longer slot to eliminate stud bind issues. Plus, the roller tip minimizes scrubbing (the result of the valve stem pushing hard against the valve guide) with reducing friction.

  • 4340 steel rocker body
  • Excellent replacement for stock or sportsman engines
  • Eliminates noise & slop associated with worn or high mileage rockers
  • Includes polylocks and grooved balls

Application

  • 262 V-8
  • 265 V-8 1955-1957
  • 267 V-8 1979-1982
  • 283 V-8 1957-1967
  • 302 V-8 1967-1968
  • 305 V-8 1976-2000
  • 307 V-8 1968-1973
  • 327 V-8 1962-1969
  • 350 V-8 1967-2000
  • 400 V-8 1970-1980

CARB Warning

For race/ off road use only

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. 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.

Speedway Motors 57583521 Specifications

KEY SPECS
MFG. Part #57583521
BrandSpeedway Motors
Rocker Arm StyleRoller Tip
Rocker Arm Ratio1.6:1
Stud Size.4375"
Material TypeSteel
GENERAL
Stud Diameter0.4375"
Rocker Arm Nut StylePolylock
Sold in QuantitySet
Self-AligningNo

Ratings & Reviews

5

2 Reviews

Overall Assessment

Customers appreciate the product for its quality and practicality, specifically mentioning the inclusion of a fulcrum and poly locks. One review reaffirms their intent to repurchase. Another customer successfully used a 1.5 factor of the product and plans to use 1.6 in their next build, highlighting its usability across multiple projects and preference over competitor's offerings. The product exceeded spring limit projections, indicating its efficiency and superior performance.

5

2 reviews

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I would buy product again.

5.0

2 years ago

Jake

Benson,N.C.

Verified

Came with fulcrum and poly locks great product

Would Recommend

Like it so far

5.0

8 years ago

Bootjackspecial

Mariposa ca

Verified

The 1.6 put me over my spring limit. So I put 1.5 on, like them so far, 1.6 will be on my next build

Would Recommend

Showing 2 of 2 reviews

Questions & Answers

3 Questions • 3 Answers

Is there a max RPM and Lift associated with these rocker arms?

by Marsh

• 7 years ago

1 answer

Will these fit my 96 Lt1 350

by Chico

• 8 years ago

1 answer

How many comes with a set?

by Weaver

• 9 years ago

1 answer

3 of 3 questions shown

Fitment

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  • Vortec L31 Small Block Chevy

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  • Gen 1 L81 Small Block Chevy

  • Gen 1 L05 Small Block Chevy

  • Vortec L31 Small Block Chevy

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  • Gen 2 LT1 Small Block Chevy

  • Vortec L31 Small Block Chevy

  • Gen 1 L05 Small Block Chevy

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  • Gen 1 L48 Small Block Chevy

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  • 2-Piece Rear Main Chevy 350

  • Gen 2 LT1 Small Block Chevy

  • Gen 2 LT1 Small Block Chevy

  • Vortec L31 Small Block Chevy

  • Gen 1 L46 Small Block Chevy

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  • 2-Piece Rear Main Chevy 350

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  • Gen 1 L82 Small Block Chevy

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  • Gen 1 L05 Small Block Chevy

  • Vortec L31 Small Block Chevy

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  • 327 Chevy Small Block V8

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  • 2-Piece Rear Main Chevy 350

  • 327 Chevy Small Block V8

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  • 327 Chevy Small Block V8

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  • Gen 1 L05 Small Block Chevy

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  • 2-Piece Rear Main Chevy 350

  • Gen 1 L05 Small Block Chevy

  • 2-Piece Rear Main Chevy 350

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  • 2-Piece Rear Main Chevy 350

  • Gen 1 L05 Small Block Chevy

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  • 327 Chevy Small Block V8

  • 327 Chevy Small Block V8

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  • 327 Chevy Small Block V8

  • 2-Piece Rear Main Chevy 350

  • 2-Piece Rear Main Chevy 350

  • Gen 1 L05 Small Block Chevy

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  • Gen 1 L98 Small Block Chevy

  • Gen 1 L05 Small Block Chevy

  • 327 Chevy Small Block V8

  • 327 Chevy Small Block V8

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  • Gen 1 L82 Small Block Chevy

  • 2-Piece Rear Main Chevy 350

  • Vortec L31 Small Block Chevy

  • Gen 1 L46 Small Block Chevy

  • Gen 1 L48 Small Block Chevy

  • Gen 1 L65 Small Block Chevy

  • Gen 1 L81 Small Block Chevy

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  • 350 Chevy Small Block V8

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