Diesel and gasoline exhaust tips, all catalytic converters for cars. Now you can change your exhaust filter at the lowest prices, same as original tips, no difference between them. Euro 5, Euro 6. Diesel tips are metallic, made of platinum, palladium, and iridium. These precious metals are what purify carbon, save you fuel, and reduce noise. Maintaining the emission control gives the engine and transmission a longer life, as it balances the movement. Draining is not increasing speed as you think, draining is destruction.