CTS Turbo BOSS500 is an upgrade turbo kit for FSI engines with a timing belt. The modular design uses a proprietary CHRA fitted into a dedicated cast and machined CTS Turbo exhaust housing.
The exhaust housing is compatible with any exhaust downpipe, while the scroll area is designed with an approximate 0.63 AR ratio. The kit includes dedicated oil and water lines and allows direct installation without vehicle modifications.
The turbo is currently compatible with the CTS Turbo intake system. The standard or CTS Turbo diverter valve, or a blow-off valve (BOV), can be used. Both the standard and CTS Turbo turbo outlet pipes are compatible.
Important: a DV blanking plate is required for Golf R Mk6 and Audi S3 8P models. The kit is not suitable for right-hand-drive vehicles.
Kit contents
- CTS Turbo Gen2 GTX 50/67 CHRA with a dual ball bearing and an 8-blade machined compressor wheel
- CTS Turbo exhaust housing
- CTS Turbo wastegate valve bracket
- CTS Turbo 4-ply silicone coupler hoses
- CTS Turbo oil lines
- CTS Turbo water lines
- All installation hardware required for fitting
Features
- Expected output from 400 to 500 hp, depending on the fuel system and engine modifications
- Direct installation without vehicle modifications
- Compatibility with the CTS Turbo intake system and the standard or CTS DV/BOV valve
- Compatibility with the standard or CTS Turbo turbo outlet pipe
- Compatibility with any exhaust downpipe
- Software calibration is possible for the standard and upgraded fuel systems
Weight: 18.14 kg
Suitable for: Audi A3 II (8P), Audi S3 II (8P), VW Golf V (1K) / VI (5K1), VW Jetta III (1K2).
Approval
This part has no TÜV certification (ABE, TTG or Teilegutachten).
Compatible vehicles (manufacturer data)
| Vehicle | Chassis | Years | Engine |
|---|---|---|---|
| Audi A3 | — | 2008–2013 | — |
| Audi S3 | — | 2008–2012 | — |
| Volkswagen Golf R | — | 2012–2013 | — |
| Volkswagen GTI | — | 2008–2009 | — |
| Volkswagen JETTA | — | 2008–2010 | — |
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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