Downpipes

Downpipes are a critical part of a vehicle's exhaust flow system, especially in turbocharged engines where they serve as the first section of piping after the turbocharger. The design and diameter of a downpipe significantly influence turbo efficiency, exhaust flow, and overall engine performance. A well-constructed turbo downpipe reduces backpressure and allows exhaust gases to exit more freely, improving throttle response and power output.

In both naturally aspirated and forced induction setups, the exhaust downpipe connects to the rest of the exhaust system, often pairing with components like a cat back exhaust system for enhanced performance gains. Upgrading the downpipe exhaust pathway is one of the most effective modifications for drivers looking to increase horsepower and torque while also enhancing the exhaust tone.

Downpipes can vary by application and emissions requirements, with some featuring high-flow catalytic converters and others being designed for off-road or track use only. Selecting the appropriate downpipe depends on vehicle type, performance goals, and local regulations. In any performance exhaust setup, the downpipe plays a foundational role in optimizing flow, temperature control, and engine output.