INDUSTRIAL INJECTION 99800-0481 TURBO CLAMP - S400 FRAME - 4.62" O.D. (4" NOMINAL) V-BAND

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

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.

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.

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.

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.