The BTR-56582 lower timing gear is engineered for GM Gen III and Gen IV LS engines using a single-roller timing-chain system. It replaces GM part 12556582 and offers enhanced durability and reduced chain-slop, contributing to improved timing accuracy and reliability in high-performance or rebuild applications.

Brian Tooley Racing BTR-56582 Includes:

• One lower timing gear (steel construction)

Brian Tooley Racing BTR-56582 Features:

• Direct replacement for GM part number 12556582
• Designed for GM Gen III/IV LS engines with single-roller timing chains
• Steel gear construction for strength and timing-chain stability
• Helps eliminate timing-chain “slop” common to factory lower gear designs

Brian Tooley Racing BTR-56582 Notes:

• Sold individually; one gear required per engine front timing assembly.
• Before installation, inspect timing-chain, sprockets, guides and tensioner for wear to ensure optimum performance.
• Ensure compatibility with single-roller chain systems; not intended for dual-roller or other non-standard gear setups.