1. Corrosion and water resistant. Easy to clean. 2. Help exhaust faster and better tone. Reduces interior resonance. 3. There is no need to replace any parts, No weld needed. No drill needed.Super Easy to Install! 4. Designed to channel out the emitted gas from the engine of the vehicle. 5. Inside Diameter: 7.2cm

http://olla.gr/universal-car-styling-stainless-steel-elbow-exhaust-tail-muffler-tip-pipe-inside-diameter-7.2cm-blue/