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ARP 233-5601 Main Cap Fastener Kit for 4-Bolt Mains

(Chevrolet S10 1988-97, Impala 1985, C1500 1988-97, K1500 1988-97, C10 Pickup 1985-86, Caprice 1985-90, 1992-93, El Camino 1985-87 + 14 more models)

Manufacturer

Picture for manufacturer ARP

Part Number

233-5601
4 reviews
Sale Price

$112.84

Estimated ship date Friday, November 20

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No Hassle Returns

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Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The ARP 233-5601 main cap fastener kit delivers professional-grade engine block reinforcement designed to eliminate main cap walk and fretting while protecting critical engine block threads. This comprehensive kit includes precision-manufactured studs or bolts, hardened parallel-ground washers, and high-quality nuts for complete installation.

Key Features:

  • Manufactured from 8740 chrome moly steel for superior strength and durability
  • Heat-treated in-house to 200,000 psi tensile strength for maximum clamping force
  • Precision J-form threads rolled after heat-treatment, providing 1000% stronger fatigue life than conventional fasteners
  • 4-bolt main configuration for enhanced engine block integrity
  • Hardened parallel-ground washers included for proper load distribution
  • Select applications feature standoff studs with serrated lock nuts for windage tray mounting

Engineered to meet the demanding standards of professional engine builders, these fasteners provide the reliability and performance required for high-stress competition and performance applications. The post-heat-treat thread rolling process ensures maximum thread strength and fatigue resistance, making ARP fasteners the superior choice for serious engine builds.

Products specifications

Fits

Chevrolet S10 1988-97, Impala 1985, C1500 1988-97, K1500 1988-97, C10 Pickup 1985-86, Caprice 1985-90, 1992-93, El Camino 1985-87, K2500 1988-95, Express 2500 1996-97, K10 Pickup 1985-86, C20 Pickup 1985-86, Express 1500 1996-97 + 9 more models

Fastener Nut Style

Standard hex

Fastener Style

Stud

Fastener Yield Strength (psi)

200,000 psi

Main Bolt Style

4-bolt

Notes

Designed to fit blocks with splayed bolts.

Nuts Included

Yes

Quantity

Sold as a kit.

Washers Included

Yes

Works with Windage Tray

Yes

Great company..Great communication..Fast shipping. A+++++++++++++++.<br>Will do business again.

Super, I am restoring an 1985 ford 150xl I order more!!!!

Transaction has been smooth so far. Pricing is great compared to other online retailers.

My ARB 50qt fridge/freezer arrived quickly and it was way cheaper than anywhere else. I was a little leery only because of that. However, I received the fridge and saved about $65 over even Amazon. No problems.

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