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INTERSTATE MCBEE

INTERSTATE-MCBEE M-3949530 T3 TURBO INLET GASKET 89–07 5.9L CUMMINS (AFTERMARKET REPLACEMENT)

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SKU:
MCBM-3949530
MPN:
M-3949530
Shipping:
Calculated at Checkout
$4.83
724-785-4022

Description

Interstate-McBee M-3949530 T3 Turbo Inlet Gasket — 1989–2007 5.9L Cummins

OEM-style T3 turbocharger inlet (turbo-to-manifold) gasket for Dodge Ram 5.9L Cummins engines. Interstate-McBee’s M-3949530 delivers a precise fit and leak-free seal on T3 undivided flanges—ideal for stock-style turbos and many common upgrades.

  • Direct replacement: Matches OEM Cummins 3949530 specifications.
  • Stamped-steel construction: Durable, heat-resistant sealing surface for repeated heat cycles.
  • T3 undivided flange: Fits the factory T3 turbo flange used on many 5.9L applications.
  • Aftermarket value: Interstate-McBee quality at a better price than OEM boxed parts.

Specifications

Manufacturer Interstate-McBee
Part Number M-3949530
OEM Cross-Reference Cummins 3949530
Flange Style T3, 4-bolt, undivided (turbo to exhaust manifold)
Material Stamped steel
Position Turbocharger inlet (turbo-to-manifold)
Qty Sold individually (1 per turbo)

Vehicle Fitment

Confirm T3 flange and verify by engine serial number (ESN) when possible.

  • Dodge Ram 2500/3500 — 5.9L Cummins
    • 1989–1993 12-Valve 6BT (T3 flange turbos)
    • 1994–1998 12-Valve 6BT (T3 flange turbos)
    • 1998.5–2002 24-Valve ISB (T3 flange turbos)
    • 2003–2007 24-Valve ISB Common-Rail (T3 flange)
  • Industrial / Off-Highway: Also used on select ISB/QSB Tier 3 engines; verify by ESN/application.

Install Notes

  • Clean mating surfaces; replace worn studs/nuts. Do not reuse a deformed or heat-damaged gasket.
  • Align the T3 flange evenly; torque fasteners per the Cummins service manual sequence.
  • Retorque after initial heat cycle if specified by your manifold or turbo instructions.

Warranty

New Interstate-McBee engine parts are backed by manufacturer warranty coverage (diesel applications typically up to 24 months from installation). Contact us for details.

Why Buy From CPP Diesel

  • Diesel-specialist fitment support for B-Series Cummins
  • Fast shipping, easy returns
  • Inventory curated for common Ram 5.9L service and upgrade paths

FAQ

Will this fit all 5.9L Cummins years from 1989–2007?
It fits applications using a T3 undivided turbo flange, which covers most 5.9L 12V, early ISB, and 2003–2007 common-rail setups. Always confirm your turbo/manifold flange before ordering.
Is this the same as Cummins 3949530?
Yes. Interstate-McBee M-3949530 is an OEM-style replacement for Cummins 3949530.
Is the gasket reusable?
Reuse is not recommended. Replace the gasket any time the turbo or manifold is removed to ensure a proper seal.
Does it also work on 6.7L ISB/QSB engines?
Some Tier 3 6.7L applications use this gasket. Verify by ESN and flange style to confirm compatibility.
T3 vs. T4—how do I know which I have?
T3 uses a 4-bolt rectangular undivided flange common on stock 5.9L setups. T4 is larger and not interchangeable. Check your turbo/manifold part numbers or contact us for help.
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