BORGWARNER 179171 S400SX3 TURBOCHARGER – S471/83, 1.10 A/R, RACE COVER, T4 HOUSING

Product Description

BorgWarner 179171, S400SX3, S471 turbo, 71mm compressor, 83/74 turbine, race cover, T4 twin scroll, S400, AirWerks, S400SX, diesel turbo upgrade, compound turbos, Cummins S400, Power Stroke S400, Duramax S400

BorgWarner 179171 S400SX3 (S471/83, 1.10 A/R T4) with Race Cover delivers proven AirWerks toughness and high-flow performance. The 71mm S471 compressor and 83/74mm turbine in a twin-scroll 1.10 A/R T4 housing make this a killer single for big-fuel builds or the atmospheric charger in S300/S400 compounds. Race cover (ported-shroud) broadens surge margin and keeps the map stable at higher mass flow.

Fitment & Notes

• Inlet/Outlet: Compressor 5.0" hose / 4.21" V-band; turbine outlet Marmon (varies by housing).
• Flange: T4 divided (twin-scroll). Requires T4 manifold and compatible downpipe/fab parts.
• Center Section: Journal bearings; adjustable compressor/turbine housing orientation.
• Use cases: Universal performance. Popular as single on built 5.9/6.7 Cummins T4 swaps and as low-pressure charger in compounds for Cummins, Duramax, and Power Stroke competition builds.

Cross-Reference / Alternatives (BorgWarner only)

• BORGWARNER 177101 – S400SX3 S475/83, 1.10 A/R, T4
• BORGWARNER 178855 – S400SX S467/83, 1.10 A/R, T4
• BORGWARNER 171702 – S400SX4 S475/96, 1.32 A/R, T6
• BORGWARNER 179176 – S400SX S476/87, 1.10 A/R, T6

What’s Included

• BorgWarner 179171 S400SX3 turbocharger (S471/83, 1.10 A/R T4) with race compressor cover

Why Buy From CPP Diesel

• Genuine BorgWarner inventory with enthusiast support
• Fast, free shipping and careful packaging
• Build guidance for single or compound setups

FAQ

Will the 179171 bolt to my stock manifold?

Not on most light-duty diesels. It’s a T4 divided turbo; you’ll need a T4 manifold and compatible downpipe.

What’s the benefit of the race cover?

The ported-shroud inlet increases surge margin and widens the effective compressor map for aggressive fueling and high mass flow.

Is it streetable as a single?

With adequate fueling, converter/gearing, and supporting mods—yes. For faster spool on smaller displacement or milder fuel, consider running it atmospheric in compounds with an S300 high-pressure turbo.

Specifications for BORG WARNER 179171