Every supplier will tell you their Chrome Dual Exhaust Extensions are the best. Are they really? Our Super Show BrandTM Dual Exhaust Extensions are made out of an alloy called inconel. Inconel is an alloy of nickel, chromium, and iron that is highly resistant to high temperatures and corrosion, making it a perfect choice for exhaust components. An added benefit of inconel is that it takes a beautiful chrome finish.  Inconel is commonly used in helicopter and airplane exhaust applications. Mild steel trumpets just cannot take or hold a chrome finish like inconel does. If you only want to replace your trumpets once, buy yourself a set of Super Show BrandTM Exhaust Extensions from OldsParts.com. Fits all 1968-72 442, Hurst/Olds, SX, and all other applications using the dual exhaust rear bumper. Sold in pairs.