Stainless Bros 3.5in SS321 45 Deg Mandrel Bend Elbow - 1D Radius 16GA/.065in Wall (Leg)

This is a 3.5-inch diameter, 45-degree mandrel bend elbow from Stainless Bros. It's made from SS321 stainless steel, which is known for its good resistance to high temperatures and corrosion, making it a solid choice for exhaust system fabrication. The 1D radius means the bend is tight, with the center of the tube bending on a radius equal to its diameter, which helps maintain good exhaust flow compared to tighter bends. The wall thickness is 16 gauge, or about .065 inches, which is strong enough for most exhaust applications.

Mandrel bending is key here because it means the tube's diameter is kept consistent throughout the bend, unlike crush bends that can restrict flow. This is important for custom exhaust projects where maintaining smooth airflow is critical for performance. The SS321 material is a step up from standard 304 stainless, offering better performance in very hot conditions, often found in performance exhaust systems.