Downpipe for Opel Astra G, Astra H, Zafira A + B — TA Technix
Ref. 06OP006
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Downpipe for Opel Astra G, Astra H, Zafira A + B
Features
Technical details
- Replacement pre-catalytic converter pipe
- With 63 mm pipe diameter
What this part changes
The downpipe is the pipe that runs down from the turbo. This is where backpressure builds up: the turbine has to expel the gases through a restricted 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 you feel most on a turbocharged engine.
What changes behind the wheel is the response. The turbo takes less time to spool up, and the power holds on 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 unused.
What to plan for
- ECU remapping: essential to make the most of the gain and prevent limp mode.
- Without a catalytic converter, the vehicle is no longer road-legal and the engine warning light will come on if no electronic measures are taken.
- Check the sensor port: single or double depending on the engine, as indicated in the product page's technical details.
- Removal often requires access from underneath and removal of an engine mount: plan to use a lift or axle stands.
Compatible vehicles
| Brand | Model | Engine | Years |
|---|---|---|---|
| Opel | Astra G-CC+Caravan, type T98 | 2.0l-16V Turbo - 147kW | — |
| Opel | Astra G Coupé+Cabriolet | 2.0l-16V Turbo - 140+141+147kW | — |
| Opel | Astra H 5-door, GTC, Cabriolet, Caravan, type A-H | 2.0l Turbo - 125+147kW | — |
| Opel | Astra H GTC OPC | 2.0l Turbo - 177kW | — |
| Opel | Zafira A+B, type T98/moncab | 2.0l-16V Turbo - 140+141+147kW | — |
Delivery & warranty
Frequently bought together
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