Product Description
BorgWarner 179478 S500SX-E Exhaust Housing — 110mm, 1.15 A/R, T6
BORGWARNER 179478 delivers premium exhaust flow with its twin-flow S500SX-E design. With a 110mm turbine wheel, 1.15 A/R ratio, and a T6 inlet twin divided flow (volute) configuration, this exhaust housing is built for high horsepower capability in demanding applications.
Key Specifications
- Exhaust Housing Type: T6 twin flow divided volute (twin-scroll style) turbine inlet
- A/R Ratio: 1.15
- Turbine Wheel Size: 110mm OD
- Inlet Centerline (A): 3.62” (≈92 mm)
Designed for S500SX / S500SX-E frame turbos. Requires matching turbine manifold, and appropriate exhaust & downpipe routing. Not bolt-and-go on stock manifolds without modification.
What’s Included
- BorgWarner 179478 S500SX-E Exhaust Housing 110mm 1.15 A/R T6 Twin Flow Volute
Recommended Add-Ons
- CPP S500SX Turbine Inlet Manifold Kit
- CPP S500SX T6 Downpipe Adapter
- Fleece Supercore Stud Kit for S500SX
Popular Fitment / Build Considerations
Supercore / Single Turbo Builds: When using the S500SX-E or pairing with this housing, expect strong top-end, but needs proper fueling, exhaust, manifolds, wastegate sizing, etc. for full potential.
Compound Turbo Systems: Use this housing paired with a proper high-pressure unit (S300 or S400) for compound setups where this can act primarily in the lower exhaust pressure side or in atmospheric role.
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FAQ
Will the 179478 bolt onto stock exhaust manifolds?
No. The T6 inlet and twin-flow divided volute require a matched manifold or adapter. Stock manifolds will generally not have the correct flange or flow path.
How does the 1.15 A/R housing affect spool and top end vs smaller A/Rs?
This 1.15 A/R will tend to deliver better mid-to-top end flow compared to smaller A/R (0.85, 1.00, etc.), but will spool slower. It’s most useful where exhaust energy is high (large displacement, high fuel, compound setups).
Is the “Twin Flow / Divided Volute” design worth it?
Yes — divided/twin flow helps improve exhaust pulse separation and scavenging, which reduces backpressure and improves overall efficiency when properly tuned.
Does this housing fit both S500SX and S500SX-E frames?
Yes — the turbine housing is common across S500SX and S500SX-E for many applications. The difference is largely in the compressor wheel (cast vs billet, blade count), not the turbine housing geometry.
What other parts will I need when upgrading?
You’ll need a matching exhaust manifold, downpipe, a proper wastegate, and possibly fuel system upgrades depending on HP goals. Also ensure proper oil feed & drain setup.
Why Buy BorgWarner Turbos and Accessories from CPP Diesel
- Real-world fitment advice for Cummins, Powerstroke & Duramax platforms
- Fast shipping & safe packaging on turbo parts
- Genuine replacement & race-grade components (not counterfeit cast-offs)
- Phone & chat support from experienced diesel builders
