Quiet down your BMW's exhaust note with the Walker Quiet-Flow Exhaust Muffler Assembly 46748, a direct-fit bolt-on replacement for the 1987-1991 BMW 325i and 325is, and the 1988-1991 BMW 325iX. This aluminized-steel, oval-body assembly features a 2.25" outside-diameter outlet with dual tips and a 2-bolt loose-flange inlet, so it drops into place using OE-style routings, brackets and hangers — no specialized fabrication or welding required.
Premium acoustic control: OE-style louvered tubes lower noise levels while domed heads help reduce radiated noise for a factory-style sound quality compared to straight perforated tubes.
Built to last: internal partitions and mechanically joined tubes allow expansion and contraction through temperature swings to minimize distortion, while spun-locked heads and OE-style spot welds add stability.
Resists corrosion: an internal drainage system helps reduce moisture collection inside the muffler.
Acoustic- and flow-tested for OE-style sound you can count on, and backed by Walker's limited lifetime warranty and the 90-Day Safe and Sound Guarantee. No gasket or seal is included. Country of origin: Taiwan.
Interchange: 285-053
285053 · 7871
This part cross-references / interchanges with the following part numbers:
Which vehicles does the Walker 46748 muffler fit?
It is a direct-fit replacement for the 1987-1991 BMW 325i and 325is, plus the 1988-1991 BMW 325iX. Check the Buyer's Guide tab to confirm your exact vehicle.
What is the outlet size on this muffler?
The outlet measures 2.25 inches outside diameter and uses dual tips, with a 2-bolt loose-flange inlet.
What is the muffler made of?
It has a steel, oval-shaped body with an aluminized finish for corrosion resistance.
Does this muffler include a gasket or seal?
No. A gasket or seal is not included, so source any sealing hardware separately as directed by the service procedure.
Do I need welding to install it?
No. It is a direct-fit bolt-on solution that installs using factory-style pipe routings, brackets and hangers, so no specialized fabrication or welding is required.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
