BORG WARNER 176812 S400 TURBINE HOUSING 83MM 1.25 A/R T6

Product Description

BorgWarner 176812 is the go-to S400 turbine (exhaust) housing when you want strong top-end flow without giving up the pulse energy benefits of a divided T6 inlet. Sized at 1.25 A/R for the 83mm S400 turbine wheel, it pairs beautifully with popular S400/SX/SX-E builds and atmospheric chargers in compound setups—while the 5.75" Marmon outlet keeps your downpipe interface simple and reliable.

BorgWarner 176812, S400 turbine housing, 83mm 1.25 A/R T6, twin scroll divided T6, AirWerks S400SX S400SX4, 5.75 Marmon outlet, diesel performance turbo parts, CPP Diesel BorgWarner housing

Fitment & Notes

• Turbo series/frame: BorgWarner S400 / S400SX / S400SX-E / S400SX4 (AirWerks)
• Turbine wheel: 83mm (match wheel/hub before ordering)
• Inlet: T6 divided (twin-scroll)
• Outlet: 5.75" Marmon V-band
• A/R: 1.25
• Use cases: Big single S400 builds or low-pressure/atmospheric charger in S300/S400 compounds

Cross-Reference / Alternatives (BorgWarner on CPP Diesel)

• BORG WARNER 176809 — 83MM, 0.90 A/R, T6
• BORG WARNER 176810 — 83MM, 1.00 A/R, T6
• BORGWARNER 176811 — 83MM, 1.10 A/R, T6
• BORGWARNER 171698 — 96MM, 1.32 A/R, T6
• BORGWARNER 179641 — 87MM, 1.25 A/R, T6
• BORGWARNER 14961019007 — 96MM, 1.15 A/R, T6

FAQ

Is this a direct bolt-on for my stock manifold?

No. This housing uses a T6 divided inlet and is sized for an 83mm S400 turbine wheel. Most OEM light-duty setups are T3/T4 with smaller turbines.

Is it twin-scroll or open volute?

Twin-scroll (divided). Use with a divided T6 manifold for best pulse energy and drive-pressure balance.

What outlet connection does it use?

5.75" Marmon V-band. Confirm your downpipe/v-band size and clamp before ordering.

Will it fit my S400SX/SX-E?

Yes, provided your turbine wheel is the 83mm variant and your center section/downpipe hardware matches the T6 divided / 5.75" Marmon spec.

Specifications for BORG WARNER 176812