Krator DIY Exhaust Pipe Kit SteelFeatures: [CNC MANDREL PIPE BENDS] Krator's mild steel custom exhaust kit offers a robust variety of straight and mandrel bent exhaust pipe tubing. Our mandrel bent piping is CNC machined for high precision. This ensures that you get the performance you want out of your custom exhaust. [WHAT'S INCLUDED] Krator's exhaust pipe kit includes: two 48 inch long straight pipe exhaust kit tubes, two 90 degree mandrel bend elbow tubes, two 45 degree mandrel