Product Description
Secure your S400 turbine outlet the right way. The INDUSTRIAL INJECTION 99800-0481 is a heavy-duty 4.62" O.D. (4" nominal) V-band clamp engineered for the BorgWarner S400 frame turbine discharge. Built for high heat and vibration, it delivers a tight, leak-resistant seal for downpipes and adapters on performance diesel builds.
Fitment
- Turbo Type: BorgWarner S400 / S4xx turbine outlet (also commonly called “Marmon 4.62”)
- Outlet Size: 4.62" outside diameter (4" nominal V-band)
- Typical Uses: Downpipe and adapter connections on high-performance Cummins, Duramax, and Power Stroke builds using S400 turbos
Specs
- Clamp Style: V-band (Marmon) with T-bolt
- Mating Surface: 4.62" O.D. turbine discharge
- Construction: High-temperature, corrosion-resistant hardware
Why It Works
- Positive, repeatable seal under boost, heat cycles, and vibration
- Service-friendly: quick assembly/disassembly for turbo swaps and downpipe changes
- Built for power: reliable clamping force for big-fuel/big-air setups
Recommended Parts
- S400 4.62" turbine outlet V-band flange (mates to this clamp)
- 4" downpipe or adapter designed for S400 4.62" O.D. outlet
- Exhaust wrap or heat shielding for nearby components
- Anti-seize for the T-bolt threads
Helpful Notes
- Measure the outside diameter of your turbine discharge (should be ~4.62"). This clamp does not fit smaller 3.5" or larger 5" outlets.
- Use with a properly matched 4.62" Marmon/V-band flange; sealing relies on correct flange geometry and alignment.
- Re-torque after initial heat cycles for best long-term sealing.
Cross-Reference / Alternatives
- Common name: Marmon 4.62" S400 turbine outlet clamp
- Alternate need: If your outlet measures ~3.50" or ~5.00" O.D., select the correct-size V-band clamp instead.
FAQ
Is this the right clamp for my S400?Most S400 turbine discharges use a ~4.62" O.D. Marmon/V-band. Measure the outside diameter of your turbine outlet; if it’s ~4.62", this clamp is the correct size.
What flange do I need with this clamp?You need a matching 4.62" Marmon/V-band flange on the downpipe or adapter. Proper flange geometry and alignment are critical for a leak-free seal.
Will this fit S300 or other frames?S300 and other frames typically use different outlet sizes. Check your turbo’s turbine discharge O.D. and select the clamp that matches that measurement.
Torque and maintenance tips?Apply a small amount of high-temp anti-seize to the T-bolt threads, tighten evenly, and re-check torque after a few heat cycles.
