Use this exhaust system when you want to make your classic Chevrolet muscle car stand out on the road or at car shows. It's perfect for car enthusiasts who love to enhance the performance and sound of their 1961 - 1964 Chevrolet Impala, Bel Air or Biscayne. The main piping is 2.5 inches in diameter, and the tips are 3 inches. It's made of durable stainless steel, so you don't have to worry about corrosion over time.