Tri-Y DLM LS1 Long Primary 1-3/4 - 1-7/8

The Tri-Y DLM LS1 Long Primary 1-3/4 - 1-7/8 exhaust header is designed specifically for LS1-powered vehicles and street/strip builds that aim for enhanced scavenging efficiency and power gains across the RPM range. This tri-Y configuration effectively routes exhaust gases from three cylinders into a common collector, optimizing gas velocity and minimizing backpressure.

The long primary design maximizes low-to-mid-range torque, making it a valuable asset for street cars and bracket racers who need reliable power delivery. The header features 1-3/4 inch primary tubes and 1-7/8 inch secondary collectors, which are designed to match the natural expansion of exhaust gases as they move toward the catalyst converter or downpipe. This construction allows each cylinder bank to evacuate exhaust gases independently and efficiently.

Ideal for LS1 swap builds, Corvettes, Camaros, and trucks, this header balances port velocity with peak horsepower while maintaining streetability. Installation is straightforward on both stock and modified LS1 engines, ensuring that enthusiasts can easily enhance their vehicle's performance.