J-Bend Mild Steel 2.250 x 4in Radius 18 Gauge

The J-Bend Mild Steel 2.250 x 4in Radius 18 Gauge exhaust bend is a precision mandrel-formed component designed for custom exhaust system fabrication and restoration work. Built for automotive enthusiasts and professional fabricators, this mandrel bend maintains a consistent 2.25-inch diameter throughout the curve, eliminating the kinks and flow restrictions that plague traditional squeeze bends. Whether you're building a high-performance exhaust for a street rod, restoring a classic muscle car, or tuning a modern performance vehicle, this bend delivers the smooth transitions necessary for optimal exhaust scavenging and horsepower gains.

Manufactured from mild steel and formed using mandrel technology, this J-Bend features a 4-inch radius curve with 6 x 15-inch legs, providing versatile routing options for tight engine compartments and complex chassis layouts. The 18-gauge wall thickness offers an ideal balance between durability and weight, resisting collapse under high exhaust temperatures while remaining workable for welding and final fitting. The consistent inner diameter ensures minimal turbulence and backpressure, which translates directly to improved engine breathing and sustained power delivery across the RPM range. Each bend is individual, allowing customization in your fabrication process without compromise to flow characteristics.

This component is ideal for fabricators building custom headers, mid-pipes, or downpipes for naturally aspirated and forced-induction engines alike. The 2.25-inch diameter suits small-block and mid-sized V8 applications, popular turbo platforms, and high-revving four-cylinder builds. Installation requires basic welding skills and proper exhaust system design to maximize flow benefits; pair this bend with mandrel bends of matching diameter for continuous, unrestricted exhaust paths. Weighing 3.85 lbs and dimensioned at 11.9 x 3.6 x 21.8 inches, it ships ready to integrate into your fabrication jig or assembly.