ARP 134-5603 Main Stud Kit Small Block Chevy World Products Motown Iron Block 4-Bolt

The ARP 134-5603 Main Stud Kit is specifically engineered for World Products Motown iron block small block Chevy engines with 4-bolt main caps. This complete kit provides superior main cap retention and eliminates common issues like main cap walk and fretting while protecting the threads in your engine block.

Key Features:

• Manufactured from premium 8740 chrome moly steel for exceptional strength and durability
• Heat-treated in-house to 190,000-200,000 psi tensile strength rating
• Precision J-form threads rolled after heat-treatment for 1000% stronger threads compared to conventional fasteners
• Includes outer bolts for main caps #2, #3, and #4 as required by Motown block design
• Complete kit with hardened parallel-ground washers and high-quality hex nuts
• Studs provide more accurate torque readings than bolts since they don't twist during installation
• Black oxide finish for corrosion resistance

ARP studs are the preferred choice of professional engine builders for high-performance and competition applications. By using studs instead of bolts, you achieve more precise main cap alignment and reliable clamping force, which is critical for maintaining bottom end integrity in high-horsepower builds. This kit is specifically designed to work with the unique main cap configuration of World Products Motown iron blocks.