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Product Summary

Chevy Small Block V8, Roller Rocker Arm Style, Natural

  • Built of 15-5PH material for superior strength
  • Have more needle bearings to increase strength while reducing friction
  • Built to clear 1.55" valve springs and includes polylocks

Key Specs

MFG. Part #57523509
Rocker Arm StyleRoller
Rocker Arm Ratio1.5
Rock Arm Ratio1.5
Stud Size0.4375"

Need To Know

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Quick and Easy Returns

Details

These small block Chevy stainless steel roller rockers are built of 15-5PH material which gives you superior strength over other stainless rockers. They have more needle bearings which increases strength while reducing friction. Built to clear 1.55" valve springs.

  • Designed for higher open valve spring pressures
  • Strong 15-5PH stainless steel
  • Specially cast and machined for larger valve springs and retainers
  • Light weight with integral pushrod seat
  • Oversize trunions and full roller precision needle and cage bearings
  • More needle bearings for increased performance and rocker life
  • CNC machined pushrod cups and heat-treated Cr40 roller tips
  • Internal oiling system for long lasting performance
  • H.D. Polylocks included

Application

  • 265 V8 1955-1957
  • 267 V8 1979-1982
  • 283 V8 1957-1967
  • 302 V8 1967-1968
  • 305 V8 1976-1986
  • 307 V8 1968-1973
  • 327 V8 1962-1969
  • 350 V8 1967-1986
  • 400 V8 1970-1980

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.

Specifications

KEY SPECS
MFG. Part #57523509
BrandSpeedway Motors
Rocker Arm StyleRoller
Rocker Arm Ratio1.5
Rock Arm Ratio1.5
Stud Size0.4375"
GENERAL
Stud Diameter0.4375"
Rocker Arm Nut StylePolylock
Material TypeStainless Steel
FinishNatural
Sold in QuantitySet
Thread Pitch7/16"-20
Self-AligningNo