How Does an Upgraded Downpipe Help?

Downpipes are sections of pipes that connect the exhaust side of a turbocharger to the start of a vehicle's exhaust system, allowing the exhaust gases to exit the engine. Downpipes also contain catalytic converters that reduce the emission of harmful gases during operation. Due to its location immediately after the turbine, the efficiency of the downpipe directly affects the spool and turbine performance.

 

Drain Pipes Move Air

Factory audi rs3 downpipe must meet emission standards and provide enough air movement to meet the production car's performance requirements. Multiple high cell count catalytic converters, small pipe diameters and restrictive angles contribute to low flow rates on downspout downpipes.

Modernised audi s3 8v downpipe come in two types: high flow catted and catless. The only difference between the two is whether the catalytic converter is included or excluded.

Benefits of a Catless Downpipe:

The biggest advantage of a catless ttrs downpipe is the unrestricted flow of exhaust gases. Without the cat, the downpipe is a straight pipe allowing the exhaust gases to exit the turbocharger as fast as possible.

Disadvantages of a Catless Downpipe:

The most obvious disadvantage is the environmental impact of the unrestricted exhaust flow. With a downpipe without spools, it's unlikely that a car will pass emissions testing even in states with lenient regulations.

Benefits of Catted Downpipes:

The leg downpipe provides a significantly higher flow rate than standard equipment, but saves on catalytic converters, better protecting the environment and increasing the chances of passing annual emissions tests.

In practice, the difference in power gain between a downpipe with and without a coil is negligible. In most outdoor applications, a downpipe with high flow coils will be the best option for both performance and environmental impact.

What Changes Besides Horsepower?

The most obvious change with the upgraded downpipe is performance improvements, but a few other things could change as well.

Sound

Larger piping and less restrictive catalytic converters not only allow more airflow, but also more sound. While not as loud as the exhaust system, the performance downpipe provides more engine noise while driving, adding to the overall experience.

Improved Appearance of the Engine Compartment

This is highly dependent on the vehicle and the location of the downpipe, but in some cases the location where the downpipe connects to the turbo can be seen when the hood is up. Depending on the brand of downpipe, the polished metal will stand out, complementing the overall look of the engine bay.

Upgraded downpipes provide big horsepower and torque increases on turbocharged vehicles by allowing exhaust gases to flow more easily as they leave the turbo. Combined with the proper software, a downpipe can bring significant gains and make a vehicle more fun and engaging to drive. With the potential downsides in mind, upgrading to a higher flow downpipe is a great option for those who want to get the most out of their car without going into upgraded stage 3/turbo territory.

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