Mandrel Exhaust Tube: 2.5" outer diameter. Pipe is thick enough to be butt welded together easily. Expand-on Pipe End : All of the pipes have flared ends for easy sliding installation. The elbow is also full size to achieve smooth exhaust. Custom Pipe: If the existing exhaust pipe is rusted, it will affect the efficiency of the exhaust. Now is the time to build a new and more efficient exhaust system. Professional Mandrel Bend: Maximize airflow to unlock the full potential and horsepower of your engine. Redundant Design: Made of high quality 304 stainless steel material. Tubes long enough to meet your custom needs. Cutting, welding will be required Specification: Type: 90 degree bend Application: universal fit Installation Type: weld-on Material: 304 stainless steel Outer Diameter: 2.5 inch Package Includes: 1 pc 90 degree pipe Custom Your Own Exhaust System: Rebuild the exhaust system to release the maximum horsepower and torque of the engine. Stainless Steel Structure: Made of 304 stainless steel, it will perfectly replace your existing exhaust system.