Audi s4 b8/8.5 test pipes with heat shield

Installing test pipes on an Audi S4 can provide several benefits, particularly for performance, exhaust flow, and sound. However, it's important to weigh the advantages against the potential drawbacks, especially regarding emissions regulations. Here's a breakdown of the pros of installing test pipes on your Audi S4:

1. Improved Exhaust Flow:

• Test pipes replace the catalytic converters in the exhaust system, which can significantly reduce exhaust flow restriction. This allows for a freer flow of exhaust gases, which can increase engine efficiency and potentially lead to higher horsepower and torque, especially when paired with other performance modifications like a turbo upgrade or remapping.

2. Increased Power and Performance:

• By removing the catalytic converters and reducing backpressure, test pipes can improve the vehicle’s overall performance, particularly in terms of acceleration and throttle response. The improved exhaust flow allows the turbocharged engine in the Audi S4 to operate more efficiently, potentially resulting in noticeable power gains.

3. Louder, More Aggressive Exhaust Note:

• Test pipes generally increase the volume of the exhaust note because they eliminate the restrictive nature of the catalytic converters. This results in a deeper, louder, and more aggressive sound, which is appealing to car enthusiasts who want a more throaty exhaust note, especially on a performance-oriented vehicle like the Audi S4.