Husqvarna Dual-Inlet Twin Cylinder Engine Muffler — OEM 539131604, Fits EZ/FD/LSZ Models, Made in USA

This replacement muffler is an original equipment manufacturer (OEM) component made in the United States and produced to Husqvarna specifications for reliable fit and function. It is built for two-cylinder engines and intended for models across the EZ, FD and LSZ lines where a dual-inlet exhaust connection is required. Choosing an OEM unit ensures compatibility with factory exhaust ports and helps restore original noise control and exhaust routing.

Which Husqvarna models does this muffler fit?

This muffler is compatible with a range of Husqvarna lawn tractor models that use dual-inlet two-cylinder engines. Confirm your machine’s model and engine configuration before ordering to ensure correct fitment.

• Fits: FD61M, FD52M
• Fits EZ series: EZC 4824, EZ 4824 (including BF, CA, K, TF BF variants), EZ 5224, EZ 5225, EZ 5226
• Fits larger deck/zero-turn style: LSZ 5422
• OEM part number: 539131604 — use this number to verify compatibility with your service manual

How does this OEM muffler affect performance and noise?

As a factory-spec muffler it maintains the original exhaust path and backpressure characteristics created by Husqvarna. While it won't change engine power, it restores designed noise reduction and helps the engine run with the exhaust flow intended by the manufacturer.

• Reduces engine noise to originally specified levels.
• Preserves correct exhaust routing and backpressure for two-cylinder motors.
• Replaces corroded or damaged mufflers to prevent leaks and exhaust blow-by.

What are the build and package details I should know?

This is a single-piece muffler assembly supplied as one unit per package and manufactured to Husqvarna’s original equipment standards. Materials and welds meet the tolerance and durability expected for outdoor power equipment use.

• Package contents: one (1) authentic Husqvarna engine muffler.
• Manufactured in the United States to OEM specifications.
• Designed for dual-inlet two-cylinder engine exhaust connections.

How do I confirm this is the right replacement for my mower?

Verify your mower’s model number and compare the OEM part number 539131604 to the part referenced in your owner’s manual or parts diagram. Inspect the existing muffler for inlet arrangement and mounting points before purchase.

• Check the model stamp on your tractor (EZ/FD/LSZ designations) and engine type.
• Match inlet locations and mounting bracket geometry to your current muffler.
• Use OEM part number 539131604 to cross-reference with Husqvarna parts lists or dealer databases.

Who is this for: This genuine Husqvarna muffler is aimed at owners, repair shops, and maintenance professionals who need a direct-fit OEM exhaust replacement for two-cylinder Husqvarna and compatible Poulan lawn tractors. It’s the right choice when you want factory fitment, original noise control, and confidence that the replacement component meets Husqvarna’s manufacturing standards.