• 4-Bolt Main Stud Kit
• Eliminates main cap walk and fretting and protects threads in your
engine block
• Kits come complete with hardened parallel-ground washers &
high quality nuts
• 8740 Chrome Moly Steel with Black Oxide Finish• 8740 Chrome Moly Steel with Black Oxide Finish
• J-form threads rolled after heat-treat to create a fastener that has threads 2000% stronger than others
• Rated 200,000 yield strength
• Application: SB Chevy, Large Journal (Hex)