Secure your engine with our ZZP Ecotec main stud kit, the ultimate solution in clamping force. Built on years of ZZP dominance in the Ecotec market, this is the best and most affordable full main stud kit on the market. ZZP studs are re-useable and will last the lifetime of your engine unlike the stock torque to yield bolts.

Includes: 

• (20x) Main studs
• (20x) 12 point nuts
• 1 packet of ARP assembly lube
• Jam nut for assembly

Block line honing is highly recommended after the install of main studs. 

Torque specs to be used with included ARP assembly lube:

• Hand thread studs into block using included jam nut. Hand tight. 
• First pass: 25 lb/ft
• Second pass: 50 lb/ft
• Third pass: 65 lb/ft

Fits: All Ecotec engines including LSJ/LNF/LDK/LHU/L61/LE5/etc.