Building or modifying an exhaust system? This is a 90-degree mandrel bend made from stainless steel, with a 38mm (about 1.5 inch) diameter. The key word is \mandrel bend\ – that means the pipe is bent on a special machine that keeps the inner diameter smooth and consistent throughout the curve. This prevents crushing and restriction, allowing for better exhaust flow compared to a cheap, crimped bend. It's a performance-oriented part perfect for custom exhaust work on cars, motorcycles, or ATVs. You can weld it into your system or use clamps. From Exhaust Parts UK. Whether you're routing around suspension components or creating a specific layout, a quality mandrel bend like this is essential for a professional, high-flowing result. Check your needed diameter and angle before buying.