Product Description
Interstate-McBee M-2866337 — S400 T6 5.0″ Exhaust Outlet Gasket (Aftermarket Replacement)
Replacement exhaust outlet gasket for turbochargers in the BorgWarner S400 family equipped with a T6 turbine housing and a 5.0″ outlet. Designed to seal the joint between the turbine outlet and the downpipe/mating flange. Sold individually.
- Direct replacement: Built to OE form and fit for S400/T6 applications with a 5.0″ outlet.
- Reliable seal: Helps prevent exhaust leaks, soot tracking, and noise at the turbine discharge.
- Service friendly: Ideal for turbo installs, swaps, and routine service where the outlet joint is opened.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-2866337 |
| Application | BorgWarner S400 series, T6 turbine housing, 5.0″ exhaust outlet |
| Location | Turbine outlet to downpipe/mating flange |
| Sold As | Each (1 gasket) |
| Notes | Confirm outlet size and flange style before ordering; some S400 outlets use different joints. |
What’s Included
- (1) Exhaust outlet gasket, P/N M-2866337
Fitment Guidance
Verify by turbo model and housing casting where possible.
- Compatible with many S400-frame turbos using a T6 turbine inlet and a 5.0″ outlet.
- Not for T4 housings or outlets that use a different diameter or a v-band/marmon joint without a gasket.
Install Notes
- Clean both sealing surfaces; remove old gasket material and soot.
- Test-fit the gasket to confirm alignment of bolt holes and outlet ID.
- Install dry unless the OEM procedure specifies otherwise; avoid RTV or sealants that can contaminate the turbo.
- Torque fasteners per the turbo/downpipe manufacturer’s spec and re-check after heat cycles.
FAQ
How many gaskets do I need?
One gasket per turbine outlet joint. Order one per turbo.
Will this fit a T4 housing?
No. This part targets S400 units with a T6 turbine housing and 5.0″ outlet.
Does this replace a v-band seal?
No. If your outlet uses a v-band/marmon connection without a gasket, this part is not applicable.
