What is a downpipe on a car?

A downpipe on a car is a component of the exhaust system that connects the exhaust manifold to the catalytic converter or the rest of the exhaust system. It is typically made of stainless steel or aluminized steel to withstand high heat and prevent corrosion.

The primary function of a downpipe is to direct the exhaust gases away from the engine and reduce back pressure, allowing the engine to operate more efficiently and produce more power. The downpipe also helps to reduce exhaust noise and emissions by routing the exhaust gases through the catalytic converter.

Upgrading to a larger diameter or high-flow downpipe can increase horsepower and torque by improving exhaust flow and reducing restrictions. Some aftermarket downpipes may also have additional features such as larger diameter piping, mandrel bends, and high-flow catalytic converters for improved performance.

Overall, a well-designed downpipe can enhance the performance and sound of a car, making it a popular upgrade for automotive enthusiasts looking to increase power and improve exhaust efficiency.