For turbocharged performance cars, downpipes are one of the most common exhaust upgrades.
But what exactly is a downpipe, and why do enthusiasts replace the factory component?
The downpipe connects the turbocharger's exhaust outlet to the rest of the vehicle's exhaust system. Because it sits directly downstream of the turbocharger, its design can have an important role in exhaust flow and the overall character of a turbocharged vehicle.
Why Upgrade a Downpipe?
The factory exhaust system is designed around a combination of emissions requirements, noise regulations, durability, and everyday drivability.
Performance downpipes can be designed with a greater focus on exhaust flow.
Depending on the vehicle and configuration, a high-flow downpipe can change the vehicle's exhaust character and complement other modifications such as a cat-back exhaust, tune, or upgraded intake system.
High-Flow Downpipes
A high-flow downpipe is designed to improve the path exhaust gases take after leaving the turbocharger.
Velocity Exhausts offers high-flow downpipes for a variety of performance vehicles, including McLaren 720S, McLaren 765LT, Porsche 992 Turbo S, Ferrari 296, BMW G90 M5, BMW S58-powered vehicles, Audi RS6/RS7, and other platforms.
Catted vs Catless Downpipes
One of the biggest decisions when choosing a downpipe is whether to use a catted or catless configuration.
A catted downpipe retains a catalytic converter, while a catless downpipe removes that component.
The right choice depends on your vehicle, intended use, local emissions requirements, and the rest of your build.
Because emissions laws vary by location and application, always verify that your selected configuration is legal for your intended road use.
Downpipes and Exhaust Sound
Downpipes can also influence the sound of a turbocharged engine.
Replacing restrictive factory components can result in a more pronounced exhaust note, increased turbocharger presence, and a more aggressive overall sound depending on the vehicle.
When combined with a performance cat-back exhaust, downpipes can become part of a complete exhaust setup.
Should You Pair Downpipes With a Cat-Back?
For many enthusiasts, yes.
A downpipe changes the front portion of the exhaust system, while a cat-back system changes components further downstream.
Combining the two allows the entire exhaust system to be configured around a performance-oriented setup.
However, every vehicle responds differently, so it's important to choose components specifically engineered for your chassis.
Find the Right Downpipe
The best downpipe isn't necessarily the one with the largest diameter or loudest sound.
Fitment, construction, material, heat management, emissions configuration, and compatibility with your vehicle should all be considered.
Velocity Exhausts offers vehicle-specific downpipes and exhaust components for a growing range of turbocharged performance platforms.
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