ARP SB Chevy WP Motown iron block mbk

SKU: ARP134-5203

Main Cap Fasteners

ARP Main Bolt Kits...

Arp

ARP SB Chevy WP Motown iron block mbk

SKU: ARP134-5203

Main Cap Fasteners

ARP Main Bolt Kits...

Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

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Description

ARP High Performance Series main bolts are rated at 180,000 psi and a popular premium replacement for OEM fasteners. Designed to meet the exacting standards and demands of professional engine builders, ARP bolts are forged from 8740 chromoly steel and feature a reduced wrenching head, large underhead radius, and rolled threads for the utmost in reliability. The threads are rolled after heat-treating which gives them about 2,000 percent better fatigue strength than most main bolts that are threaded prior to heat-treating. Hardened parallel-ground washers are included with each kit.

Part Type

Main Cap Fasteners

Data: v4.2 - Upd: 2026-10-13 21:31:49

Specifications

Product Attributes - Brand: ARP
Product Attributes - Manufacturer's Part Number: 134-5203
Product Attributes - Part Type: Main Cap Fasteners
Product Attributes - Product Line: ARP High Performance Series Main Bolts
Product Attributes - UPC: 672036037741
Product Attributes - Main Bolt Style: 4-bolt
Product Attributes - Fastener Style: Bolt
Product Attributes - Head Style: Hex
Product Attributes - Works with Windage Tray: No
Product Attributes - Fastener Tensile Strength (psi): 180,000 psi
Product Attributes - Nuts Included: No
Product Attributes - Washers Included: Yes
Product Attributes - Quantity: Sold as a kit.
Product Attributes - Notes: Designed to fit World Motown cast iron engine blocks.