Exhaust Manifold Flange GM LS1/LS2/LS3/LS6

The Exhaust Manifold Flange GM LS1/LS2/LS3/LS6 from VIBRANT PERFORMANCE is a precision-engineered header flange designed for enthusiasts and professionals building or upgrading high-performance General Motors LS-series engine platforms. This component bridges the critical connection between custom headers and the engine block, providing a leak-free seal at the combustion outlet. Whether you're fabricating a custom exhaust system for a street machine, competition vehicle, or specialty build, a quality manifold flange is non-negotiable for maintaining cylinder pressure, exhaust scavenging efficiency, and overall system reliability.

Constructed from premium stainless steel, this flange features a robust 0.375-inch thickness that resists thermal warping and exhaust gas corrosion during extended use or high-temperature operation. The 1.89-inch round ports are precisely machined to match LS-series head port geometry, ensuring optimal flow characteristics and minimal turbulence at the exhaust entry point. The pair configuration (two flanges per order) accommodates dual-bank header applications typical of V8 LS engines, and the stainless construction provides superior longevity compared to mild steel alternatives, particularly in high-heat or corrosive environments. At 3.8 pounds total weight, these flanges add minimal mass while delivering the structural rigidity necessary for reliable header installation and performance exhaust tuning.

LS engine builders, street rod fabricators, and performance shops standardly specify flanges of this caliber for custom header projects where OEM solutions are unavailable or insufficient. Direct fitment to GM LS1, LS2, LS3, and LS6 platforms makes this flange an essential component for swap applications, engine bay conversions, and race-ready exhaust builds. Installation requires proper gasket selection and torque sequencing to prevent leaks, and the stainless material pairs well with both ceramic-coated and bare steel tubing. For anyone serious about LS performance, intake-to-exhaust efficiency, or fabrication-grade reliability, the Exhaust Manifold Flange GM LS1/LS2/LS3/LS6 delivers the precision and durability demanded by high-output engine platforms.