Crossover Header 1-3/4 GM LS

The Crossover Header 1-3/4 GM LS from SCHOENFELD represents a proven solution for builders seeking improved exhaust scavenging and power gains in LS-powered vehicles. Built by one of the industry's most respected header manufacturers, this crossover design is engineered to merge dual exhaust paths into a single collector, optimizing exhaust velocity and cylinder evacuation. Whether you're building a high-performance street engine, weekend track car, or competition platform, this header delivers the flow characteristics needed to unlock your LS engine's full potential.

The 1-3/4 inch primary tube diameter is a proven compromise between scavenging efficiency and mid-range torque production, making it ideal for naturally aspirated LS applications ranging from street to mild boost scenarios. The crossover design—sometimes called a "merge collector"—strategically blends exhaust gases to eliminate unequal runner lengths and cylinder pressure imbalances that plague single-plane designs. SCHOENFELD's precision mandrel-bending process ensures smooth radius bends that minimize turbulence and flow restrictions, while the robust welded construction withstands thermal cycling and vibration common in high-output engines. At 31 lbs, the header's weight reflects quality steel construction without excess material.

Installation requires proper clearance verification in your specific engine bay—header dimensions measure 10 x 10 x 38.5 inches—and compatibility with your intake manifold and exhaust collector setup. This header suits LS1, LS2, LS3, LSx, and Gen IV small-block variants commonly found in Camaros, Corvettes, Challengers, and street rods. Pair this crossover header with a matching high-flow cat converter and cat-back exhaust system to maximize dyno gains. Professional installation is recommended to ensure proper torque specs and gasket sealing for reliable, leak-free operation under sustained high RPM.