Turbosmart IWG75 Wastegate Actuator
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Turbosmart IWG75 Wastegate Actuator - Holden Astra SRi Turbo (AH) / Opel Astra OPC (H) - 7psi
The Turbosmart IWG75 is an upgraded internal wastegate actuator for the K04 turbocharger on the 2.0 litre turbo Holden Astra SRi Turbo (AH), Opel Astra OPC (H) and Zafira OPC (B). A larger effective diaphragm area and revised springs give it a higher working ratio than the factory actuator, so peak boost arrives earlier in the rev range and is held for longer, giving a broader boost and torque curve. It is a bolt-on fit with a vehicle-specific bracket.
Note: Suits the factory K04 turbocharger only - please confirm your turbo before ordering. Running a higher base spring pressure than factory is likely to require ECU tuning and recalibration. Installation by a professional is recommended.
What's Included
- IWG75 wastegate actuator
- Vehicle-specific mounting bracket
- Spring pre-fitted to the listed pressure
- Fasteners and swivel hose barb
Need help confirming fitment? Contact our team at sales@chicaneaustralia.com.au.
Vehicle Compatibility
| Make | Model | Chassis | Engine |
|---|---|---|---|
| Holden | Astra SRi Turbo | AH | Z20LER 2.0L Turbo (K04) |
| Opel | Astra OPC / GTC OPC | H | Z20LEH 2.0L Turbo (K04) |
| Opel | Zafira OPC | B | Z20LEH 2.0L Turbo (K04) |
Technical Specifications
| Spec | Value |
|---|---|
| Brand | Turbosmart |
| Series | IWG75 |
| Diaphragm | Silicone Nomex |
| Construction | Billet aluminium |
| Rod and clevis | Stainless steel |
| Spring adjustment | Turbosmart locking collar |
| Optional spring range | 3 - 26psi |
| Turbo | K04 |
| Spring pressure | 7psi |
| Part number | TS-0623-1071 |
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