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MU688 ✓ 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 overall_width: 9.750 INCHES NOMINAL IN, inlet_location: FRONT, overall_height: 4.000 INCHES NOMINAL IN, overall_length: 34.000 INCHES NOMINAL IN, operating_position: HORIZONTAL, inlet_connection_type: UNTHREADED SINGLE INLET. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2990-00-258-6486, 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
MU688
NSN: 2990-00-258-6486
FSC: 2990
CAGE: 0B0B1 — MAHLE AFTERMARKET INC. DBA AE CLEVITE INC (USA)
SPECIFICATIONS
overall_width9.750 INCHES NOMINAL IN
inlet_locationFRONT
overall_height4.000 INCHES NOMINAL IN
overall_length34.000 INCHES NOMINAL IN
operating_positionHORIZONTAL
inlet_connection_typeUNTHREADED SINGLE INLET
inlet_outside_diameter2.250 INCHES NOMINAL SINGLE INLET IN
NSN2990-00-258-6486
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available MUFFLER,EXHAUST TITLE COMPONENT PN MU688 MFR MUFFLER,EXHAUST
KEY FEATURES
•
OPERATING POSITION: HORIZONTAL
•
INLET CONNECTION TYPE: UNTHREADED SINGLE INLET
•
INLET OUTSIDE DIAMETER: 2.250 INCHES NOMINAL SINGLE INLET IN
•
INLET LOCATION: FRONT
TECHNICAL CHARACTERISTICS (FLIS)
OPERATING POSITIONHORIZONTAL
INLET CONNECTION TYPEUNTHREADED SINGLE INLET
OVERALL HEIGHT4.000 INCHES NOMINAL IN
INLET OUTSIDE DIAMETER2.250 INCHES NOMINAL SINGLE INLET IN
INLET LOCATIONFRONT
OVERALL LENGTH34.000 INCHES NOMINAL IN
OVERALL WIDTH9.750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
W0-1Interchangeable
interchangeable cross-reference
interchangeable
525-1Interchangeable
interchangeable cross-reference
interchangeable
1229W1061Interchangeable
interchangeable cross-reference
interchangeable
09-5251Interchangeable
interchangeable cross-reference
interchangeable
574C104Interchangeable
interchangeable cross-reference
interchangeable
211423Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MU688?
MU688 is a MUFFLER,EXHAUST.
What parts can replace MU688?
There are 20 known substitutes for MU688: W0-1, 525-1, 1229W1061 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MU688?
MU688 is cataloged in the Federal Logistics Information System (FLIS) under NSN 2990-00-258-6486. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026