The BTR-46386 heavy-duty timing chain delivers professional-grade durability and timing accuracy for GM Gen III, Gen IV LS, and Gen V LT platform engines. Built by an OEM Tier-1 supplier and branded by Brian Tooley Racing, this single-roller chain is engineered to replace factory part numbers 12646386 and 12586482, and is ideal for both high-performance and reliability-focused builds requiring robust single-row gear-set timing solutions. :contentReference[oaicite:0]{index=0}

Brian Tooley Racing BTR-46386 Includes:

• One heavy-duty single-roller timing chain (sold individually)

Brian Tooley Racing BTR-46386 Features:

• Single-roller chain style designed for single-row gear-set timing systems on LS and LT engines. :contentReference[oaicite:1]{index=1}
• OEM Tier-1 supplier manufacturing ensures production-line quality, strength and consistency. :contentReference[oaicite:2]{index=2}
• Direct fit for GM part numbers 12646386 and 12586482, covering a broad range of GM LS1/LS2/LS3 and LT1/LT4/L83/L86 applications. :contentReference[oaicite:3]{index=3}
• Optimized for street performance and competition use—improved timing accuracy, reduced chain slack and enhanced endurance in aggressive builds. :contentReference[oaicite:4]{index=4}

Brian Tooley Racing BTR-46386 Notes:

• Sold individually; order quantity corresponds to number of timing chains required per engine.
• When replacing the chain, inspect sprockets, tensioner and guides for wear or damage—addressing related timing components ensures best results.
• This chain is suitable for single-row gear-set systems; multi-row, dual-roller or non-standard timing drives may require alternate solutions.