The BTR-74746 exhaust valve is engineered for extreme heat dissipation and durability in GM Gen V LT1/LT4 6.2 L engines and aftermarket canted-valve heads. Its steel body with sodium-filled head ensures optimal thermal transfer, while the precision 8 mm stem and radius-groove profile deliver performance fitment and secure locking under high-RPM and boost conditions.

Brian Tooley Racing BTR-74746 Includes:

• One steel/sodium-filled exhaust valve

Brian Tooley Racing BTR-74746 Features:

• 1.590 in. valve head diameter matched to Gen V LT1 exhaust port specification
• 5.200 in. overall length compatible with GM LT1/LT4 style heads
• 8 mm stem diameter with radius-groove lock profile ensures proper retainer engagement
• Sodium-filled valve head improves heat dissipation and reduces valve head temperatures in high-load conditions
• Sourced from Tier-1 OEM provider to GM, ensuring direct-fit reliability and value

Brian Tooley Racing BTR-74746 Notes:

• Sold individually — order quantity based on engine cylinder count
• Verify valve guide clearance and installed spring height when installing in race or boosted applications
• Intended for direct replacement in GM LT1/LT4 heads or compatible aftermarket heads; ensure piston-to-valve clearance when modifying heads.