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BorgWarner AirWerks S400SX4 Turbo 1.32 A/R - 75mm 100/96 - 171702 aka S475X4



AR - Compressor Wheel
£ 448.92
excl. 20% VAT , Free shipping
£ 769.57
£ 538.70
incl. 20% VAT , Free shipping
instead of: £ 769.57
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Order within the next 0 hours 0 minutes 0 seconds and your package is expected to arrive between 22.06.2026 - 23.06.2026

BorgWarner AirWerks S400SX4 Turbo - 75mm 100/96

BW part number 171702 aka S475SX4

Genuine BorgWarner AirWerks turbocharger

Note: Currently, some compressor housings come without a logo! This is not a difference in quality! All components come directly from BW USA from the factory.

AirWerks S475SX4 turbochargers from BorgWarner Turbo Systems are dedicated aftermarket turbos for the performance sector. Proven line-produced parts (mostly from Schwitzer Turbo) are being combined to deliver high end tuning and motorsports performance while maintaining an ideal price/performance ratio.

The S400SX Series has been developed exclusively with the American sports compact class in mind. These turbochargers are even more focused on motorsports in terms of performance and drivability.

performance rating: 500 - 1050 HP
compressor housing: intake 127mm / pressure side 107mm V-Band Flange
compressor wheel: inducer 74,56mm / exducer 100,17mm
turbine housing: 1.32 AR / header flange BorgWarner T6 Twinscroll (T6 divided) / turbine outlet BorgWarner V-Band
turbine wheel: inducer 96mm (exakter Wert ist 95,70mm) / exducer 88,05mm / external wastegate

- dual hydrodynamic journal bearing
- extended tip technology
- Twinscroll turbine housing
- adjustable orientation of compressor housing and turbine housing
- compressor housing with anti-surge ports (High-Flow)

Different A/R ratio?

If you order an AirWerks turbocharger and wish to have a different AR you have to order the corresponding turbine housing separately.
Video
What are the advantages of a turbo with ball bearings? Better than journal bearings? | Turbocharger simply explained
Turbocharger selection made easy: Try our TurboGuide
Which turbocharger is better? BorgWarner, Garrett or another one?
What does T25, T3, T4 flange mean? | Turbocharger simply explained
What does the A/R value mean - more power vs. response | Turbocharger simply explained
TwinScroll vs SingleScroll housing | Turbocharger simply explained
What should I pay attention when installing a motorsport turbocharger?
Internal and external wastegate + actuators | Turbocharger simply explained
Water cooling or oil cooling on the turbo | Turbocharger simply explained
Which oil restrictor do I need?
Extended tip technology on the compressor wheel of the turbocharger | Turbocharger simply explained

PDF
Borg Warner AirWerks S400SX4
Borg Warner Catalog 2017

Features

Accessory

Oil Return Adapter T3 short
£ 10.26 *
instead of: £ 13.50
Oil Return Adapter T3 with Inner Thread
£ 10.26 *
instead of: £ 13.50
Oil Return Adapter T3 with Outer Thread
£ 10.26 *
instead of: £ 13.50
Turbocharger Oil Return Gasket T3 T4
£ 0.94 *
instead of: £ 1.32

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