Built of 15-5PH material, Built to clear 1.55" valve springs, More needle bearings for increased strength, Reduced friction, Includes polylocks
Big Block Chevy Stainless Steel Roller Rocker Arms Speedway Motors
Big Block Chevy Stainless Steel Roller Rocker Arms
Sku # 57524542
Mfr. Part # 57524542
Condition
New
Brand
Speedway Motors
Sold
Set
Details
Info

These full-roller Stainless Steel rockers incorporate an exceptional lightweight design that provides plenty of clearance for large diameter springs. Manufactured from premium quality 15-5 PH stainless steel, a superior alloy high in Nickel and Chromium, this rigid material provides high yield strength to help resist deflection and has extraordinary fatigue resistance.

Features full-cage friction reducing needle bearings. The nose rollers and shafts are Cr40 steel, heat-treated and hardened to resist the severity of racing and to minimize "scrubbing". Each rocker body is hand-polished, assembled and carefully inspected to provide our customers with some of the finest quality rocker arms available to the racing and performance industry. 

  • 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

For 1968-1997, 302-460 c.i. Ford

For 396-454 c.i. B/B Chevy V8. 1.7:1 ratio for 7/16" stud. Includes polylocks.

For 348/409 c.i. Chevy W-Series V8. 1.7:1 ratio for 7/16" stud. Includes polylocks. 

Item Details

1.7 Ratio - 7/16" Stud

Features:

  • 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

Features:

  • 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

Specs
  • These rockers can handle up to 1,000lbs. of spring pressure, per the manufacturer's specs
Application
This Part Fits
  • 396 V-8 1966-1970
  • 402 V-8 1970-1972
  • 427 V-8 1966-1969
  • 454 V-8 1996-2000
  • Chevy 396-454, 348-409W 1958-2000
Specs
Sold in Quantity
Set
Material Type
Stainless Steel
Rocker Arm Style
Roller
Rocker Arm Nut Style
Polylock
Rocker Arm Ratio
1.7
Self-Aligning
No
Stud Size
0.4375
Stud Diameter
0.4375
MFG. Part #
57524542
Reviews

Fantastic quality at a super good price pretty happy

Rated
Product Rating
by Lindholm. Racing on March 19, 2021

Summary: The thing is I'm building a great big motor on a budget and I did not think I would have as good a quality valvetrain as I've got and these rockers made it all that the absolutely perfect in the fit and finish I was very excited I bought similar products before they weren't half as nice as these I don't have to worry about these breaking I'll be around long after this motor is dead anyway

Yes, I recommend this product.

I would buy this product again

Rated
Product Rating
by Jerry on March 08, 2019

Summary: It seem like there will build very nice

Yes, I recommend this product.

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About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 72 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.