Execution: POLISHED STAINLESS STEEL Manufacturer: TurboWorks. Input diameter: 3 "2-YEAR WARRANTY! All dimensions are shown in the drawing. The product does not have road approval. It is intended for use in motorsports, tuning exhibitions and others. Made of: POLISHED STAINLESS STEEL Manufacturer: TurboWorks. Input diameter: 3 '' 2-YEAR WARRANTY! All dimensions are shown in the drawing.