Product Description
BorgWarner 177207 S300SX3 Exhaust Housing — 0.91 A/R, 68mm, T4
BORGWARNER 177207 delivers a premium exhaust housing upgrade with a **0.91 A/R** twin-scroll volute designed for the S300SX3 series. With the 68mm turbine wheel, T4 twin inlet, and precision cast path, this housing delivers excellent spool and boosted midrange power for serious builds in Cummins, Powerstroke & Duramax platforms.
Key Specifications
- Turbine Wheel Size: 68mm exducer
- A/R Ratio: 0.91
- Inlet: T4 twin-scroll divided inlet
- Outlet: Standard twin scroll outlet (Marmon / V-band/etc., depending on configuration)
- Application: 320-700+ HP single S300 builds, or as complementary component in compound setups
Ensure matching turbine wheel diameter and correct manifold/downpipe fitment. Verify oil feed/drain clearances if run in hot-exhaust environments.
What’s Included
- BorgWarner 177207 S300SX3 exhaust / turbine housing (0.91 A/R, 68mm, T4)
Recommended Add-Ons
Build & Fitment Notes
This housing bolts to S300SX/S300SX3 turbine wheels when using the matching T4 twin-scroll inlet. Spool is improved over larger A/Rs but expect higher exhaust backpressure vs large A/R housings. Ideal for medium to large displacement diesels aiming for aggressive mid-range and top-end power.
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FAQ
Will the 177207 housing work with my existing S300 turbine wheel?
Yes — as long as the turbine wheel size (68mm exducer) matches and you're using a T4 inlet. It won’t fit properly to housings using different A/R or non-twin scroll inlets without adjustments.
Will changing to 0.91 A/R hurt spool?
Compared to smaller A/Rs, spool might be slower early, but 0.91 is balanced for good mid-range torque and high-end flow; for many diesel builds it’s a smart compromise.
Is this housing strong enough for compound builds or big single setups?
Absolutely — the casting thickness and turbine wheel sizing make it robust. Pair with appropriate manifold, wastegate, and downpipe for compounds.
What bolt-ons do I need for fitment?
Expect to require a matching T4 manifold, proper twin-scroll inlet pipe, exhaust outlet adapters (Marmon or V-band depending), and hardware that can handle high exhaust temps.
Is warranty / support provided with the product?
CPP offers warranty/support on BorgWarner parts; inspect casting, flanges, and ensure no damage on install. Contact tech if unsure.
Why Buy BorgWarner Turbos from CPP Diesel
- Deep fitment knowledge for S300/S400 upgrades on Cummins, Powerstroke & Duramax
- Trusted packaging, fast shipping, accurate part numbers
- Support from built-for-diesel experts who’ve installed these in real trucks
- Everything from replacement housings to full compound systems
