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PartsTable / COMPONENT / 987178R91
987178R91 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The MUFFLER,EXHAUST is a the manufacturer industrial component. Key specifications include material: STEEL LOCATION NOT OTHERWISE SPECIFIED, design_type: DRY, coolant_type: AIR, inlet_location: CENTRALLY LOCATED IN END OF MUFFLER, muffler_design: STRAIGHT THROUGH, overall_length: 48.000 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2990-00-142-0761, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
987178R91
NSN: 2990-00-142-0761
FSC: 2990
CAGE: 89346 — NAVISTAR INTL CORP TRUCK BR OHIO PLANT (USA)
SPECIFICATIONS
materialSTEEL LOCATION NOT OTHERWISE SPECIFIED
design_typeDRY
coolant_typeAIR
tube_quantity4
inlet_locationCENTRALLY LOCATED IN END OF MUFFLER
muffler_designSTRAIGHT THROUGH
overall_length48.000 INCHES NOMINAL IN
baffle_quantity3
outlet_locationCENTRALLY LOCATED IN END OF MUFFLER
overall_diameter7.000 INCHES NOMINAL IN
surface_treatmentALUMINUM
operating_positionVERTICAL OR HORIZONTAL
NSN2990-00-142-0761
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available MUFFLER,EXHAUST TITLE COMPONENT PN 987178R91 MFR MUFFLER,EXHAUST
KEY FEATURES
•
OUTLET LOCATION: CENTRALLY LOCATED IN END OF MUFFLER
•
SURFACE TREATMENT: ALUMINUM
•
OUTLET PROJECTION LENGTH: 4.188 INCHES NOMINAL FIRST OUTLET IN
•
INLET OUTSIDE DIAMETER: 4.0412 INCHES NOMINAL SINGLE INLET IN
•
MUFFLER DESIGN: STRAIGHT THROUGH
•
INLET LOCATION: CENTRALLY LOCATED IN END OF MUFFLER
•
OVERALL DIAMETER: 7.000 INCHES NOMINAL IN
•
OUTLET INSIDE DIAMETER: 4.031 INCHES NOMINAL FIRST OUTLET IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTLET LOCATIONCENTRALLY LOCATED IN END OF MUFFLER
SURFACE TREATMENTALUMINUM
OUTLET PROJECTION LENGTH4.188 INCHES NOMINAL FIRST OUTLET IN
INLET OUTSIDE DIAMETER4.0412 INCHES NOMINAL SINGLE INLET IN
MUFFLER DESIGNSTRAIGHT THROUGH
INLET LOCATIONCENTRALLY LOCATED IN END OF MUFFLER
OVERALL DIAMETER7.000 INCHES NOMINAL IN
OUTLET INSIDE DIAMETER4.031 INCHES NOMINAL FIRST OUTLET IN
INLET INSIDE DIAMETER4.03125 INCHES NOMINAL SINGLE INLET IN
OPERATING POSITIONVERTICAL OR HORIZONTAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
5315AInterchangeable
interchangeable cross-reference
interchangeable
2265Interchangeable
interchangeable cross-reference
interchangeable
D4300-1228Interchangeable
interchangeable cross-reference
interchangeable
22810-0Interchangeable
interchangeable cross-reference
interchangeable
22810Interchangeable
interchangeable cross-reference
interchangeable
456A291G07Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 987178R91?
987178R91 is a MUFFLER,EXHAUST.
What parts can replace 987178R91?
There are 26 known substitutes for 987178R91: 5315A, 2265, D4300-1228 and 23 more. Substitute compatibility should be verified for your specific system.
Is 987178R91 still available?
987178R91 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026