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INTERSTATE MCBEE

INTERSTATE-MCBEE M-2866337 S400 T6 5.0″ EXHAUST OUTLET GASKET (AFTERMARKET REPLACEMENT)

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SKU:
MCBM-2866337
MPN:
M-2866337
Shipping:
Calculated at Checkout
$13.50
724-785-4022

Description

Interstate-McBee M-2866337 – S400 T6 5.0″ Exhaust Outlet Gasket (Aftermarket Replacement)

The Interstate-McBee M-2866337 is a 5.0″ circular exhaust outlet gasket used on BorgWarner S400 T6 turbo 5.0″ outlet setups and on select Cummins 5″ exhaust/aftertreatment flanges (OEM x-ref: 2866337). Built to OEM-equivalent specs for reliable sealing and leak prevention in high-temp exhaust joints. Always verify dimensions and flange style before installation.

  • Universal 5.0″ outlet use: Commonly used at the turbo downpipe connection on S400 T6 5.0″ v-band style outlets and compatible 5″ flanges.
  • OEM cross-reference: Cummins 2866337 (aftertreatment/exhaust flange applications).
  • Durable materials: Designed for high heat cycles and vibration in heavy-duty diesel exhaust systems.
  • Aftermarket value: Interstate-McBee quality at a fraction of typical OEM pricing.

Specifications

Interstate-McBee P/N M-2866337
OEM Reference Cummins 2866337
Style Round exhaust flange gasket
Nominal Size 5.0″ outlet
Typical Dimensions* ~4.875″ I.D. × ~5.750″ O.D.
Position Turbo outlet / exhaust flange

*Dimensions provided for verification; measure your mating parts to confirm.

Vehicle / Application Fitment

This is a universal 5.0″ outlet gasket. Fitment depends on the turbo and flange used.

  • BorgWarner S400 (T6) 5.0″ outlet turbo installations (street/competition/custom).
  • Cummins exhaust/aftertreatment 5″ circular flange interfaces where OEM calls out 2866337 (various ISC/ISL/ISL9 and HD on-highway/industrial; verify by ESN and flange dimensions).
  • Dodge Ram 5.9L & 6.7L Cummins swaps/upgrades: When using an S400 T6 5″ outlet turbo and matching downpipe/clamp.

What’s Included

  • (1) Interstate-McBee M-2866337 5.0″ exhaust outlet gasket

Recommended Companion Parts

  • 5.0″ V-band clamp for S400 T6 outlets (match to your flange profile)
  • 5.0″ downpipe/elbow and hardware as required

Install Notes

  • Confirm the flange style (v-band vs. flat flange) and dimensions before disassembly.
  • Clean mating surfaces; inspect for warpage. Replace clamp/hardware if distorted or heat-weakened.
  • Align components without pre-loading; tighten clamps/fasteners evenly to spec.

Warranty

Interstate-McBee aftermarket components are produced to stringent quality standards. For specific warranty terms on gaskets, refer to the manufacturer’s current policy or contact us.

FAQ

Is M-2866337 only for S400 turbos?
No. It’s a 5.0″ circular exhaust/aftertreatment gasket. It’s commonly used on S400 T6 5.0″ outlets and on Cummins 5″ flange locations where OEM 2866337 is specified. Verify your exact flange style and dimensions.
Will this fit my Dodge Ram 5.9L or 6.7L?
It will fit if your setup uses an S400 T6 with a 5.0″ outlet and a matching 5″ flange/clamp. Stock turbos use different hardware—check your current turbo and downpipe.
What are the typical dimensions?
Approx. 4.875″ I.D. × 5.750″ O.D. (for reference). Measure your flange to confirm.
Is there an OEM cross-reference?
Yes—Cummins 2866337 is the standard OEM call-out for similar 5″ circular exhaust/aftertreatment flanges.
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