Forge Motorsport kit of two recirculation valves for Audi RS4 B9 and RS5 F5.
The kit includes two electronically controlled valves and a custom-made wiring harness that connects seamlessly to the vehicle’s original electronics. The system does not cause fault codes or an engine warning light, and does not negatively affect the vehicle’s operation in any way.
The valves are designed to eliminate issues with the original electronic valves, whose diaphragms can rupture and cause boost pressure to escape.
They are made from solid billet aluminium, while the internal piston design provides significantly greater reliability compared with the original valves and a very fast response.
The kit includes:
- 2 recirculation valves
- O-rings for sealing the valves
- Vacuum hoses
- Solenoid valve
- Wiring harness
- Cable ties
- Bracket and mounting hardware
- Upgraded springs – one for each valve
Suitable for: Audi RS4 V (B9), Audi RS5 II (F5).
Compatible vehicles (manufacturer data)
| Vehicle | Chassis | Years | Engine |
|---|---|---|---|
| Audi RS4 | RS4 | 2019–2025 | — |
| Audi RS5 | RS5 | 2017–2026 | s (F5) |
Before ordering, check that the product matches your vehicle (model, year and engine). If in doubt, write to us — we will check for you.

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