Downpipe with heat shield for Audi A4-RS4, A5-RS5 type B9 — TA Technix
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Downpipe with heat shield for Audi A4-RS4, A5-RS5 type B9
Specifications
Technical details
- Catless with heat shield
What this part changes
The downpipe is the pipe that runs down from the turbocharger. This is where backpressure builds up: the turbine has to push the exhaust gases through a narrowed section and often a catalytic converter. Enlarging it frees up the turbine, allowing it to build boost earlier and more decisively - it is the exhaust modification that is felt most on a turbocharged engine.
What changes behind the wheel is the response. The turbo takes less time to spool and the power continues higher in the rev range. On a remapped engine, this is the part that allows the ECU to deliver what the tune promises; without remapping, the ECU compensates and much of the potential gain remains untapped.
What to plan for
- ECU remapping: essential to take advantage of the gain and prevent limp mode.
- Without a catalytic converter, the car is no longer road legal and the engine warning light will come on if nothing is done electronically.
- Check the sensor port: single or dual depending on the engine, as indicated in the product sheet's technical details.
- Removal often requires working from underneath and removing an engine mount: plan to use a lift or axle stands.
Compatible vehicles
| Make | Model | Engine | Years |
|---|---|---|---|
| Audi | A4 Avant-RS4 Quattro type B9 | — | — |
| Audi | A5-RS5 Quattro type B9 | — | — |
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