SBC Exhaust Flange 18 Deg S/P

The SCHOENFELD SBC Exhaust Flange 18 Deg S/P (part 0161) is a precision header flange engineered for small block Chevy engine builds. This 0.25-inch thick steel component features a 1.85 x 1.77-inch square port configuration and delivers the 18-degree angled port exit required for optimal header-to-manifold fitment on modern SBC applications. Purpose-built for both street and competition engines, this flange serves as the critical interface between your header and the engine block.

The square port design and specified port dimensions ensure proper gas flow dynamics and minimize turbulence at the exhaust exit. The 18-degree angle accommodates common header tube bends while maintaining structural integrity under sustained heat and pressure cycles. Steel construction provides durability in high-temperature exhaust environments where corrosion and thermal cycling are constant stressors. At 1.5 pounds, this single flange integrates seamlessly into custom header builds without adding unnecessary weight.

This flange is essential for SBC engine builders, restoration specialists, and performance technicians who demand precise manifold matching and proper exhaust gas velocity. Whether you're assembling a period-correct small block, optimizing flow on a modified engine, or rebuilding after a complete teardown, the correct header flange ensures your exhaust system begins at the right specification. SCHOENFELD's reputation in exhaust engineering makes this component a preferred choice among those who understand the relationship between port sizing and engine breathing efficiency.