What kind of performance improvements can I expect with this muffler?

This muffler is designed to provide horsepower gains throughout the entire RPM range. This means you should notice improved acceleration and overall power delivery from your Honda CRF150R.

Does this muffler come with the Powerbomb header?

No, the Powerbomb header is sold separately. The header is constructed from durable stainless steel and is designed to complement the Factory 4.1 SO Muffler for optimal performance.

Is this muffler loud, and can the sound be adjusted?

This muffler comes with a 94dB insert, which helps to keep sound levels within regulations for many tracks and riding areas. You can use this insert to manage the exhaust note.

FMF Racing Factory 4.1 SO Muffler 041291

Name: FMF Racing Honda CRF150R 2007-24 Anod TI Factory 4.1 SO Muffler
Brand: FMF Racing
SKU: fmf-racing-fmf-racing-honda-crf150r-2007-24-anod-ti-factory-4-1-so-muffler-t14-686687
Price: 550.39 USD
Availability: BackOrder

FMF Racing Honda CRF150R 2007-24 Anod TI Factory 4.1 SO Muffler

$550.39

On Backorder — Expected to ship by Apr 22, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

FMF Racing Honda CRF150R 2007-24 Anod TI Factory 4.1 SO Muffler. Anodized titanium construction for improved performance.

Key Features

Fits Honda CRF150R models from 2007-2024.
Constructed from lightweight titanium with an anodized finish.
Provides horsepower gains throughout the entire RPM range.
Includes a 94dB insert for sound regulation.
Trusted by factory racing teams.

This muffler is designed to fit Honda CRF150R models from 2007 to 2024. Please verify compatibility with your specific vehicle.

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Product Details

If you're looking to get the most out of your Honda CRF150R on the track or out in the dunes, the FMF Racing Factory 4.1 SO Muffler is a serious upgrade. This muffler is built with performance in mind, and it's the same kind of system trusted by factory teams in various racing disciplines. It's designed to give you noticeable horsepower gains across the entire RPM range, making your bike more responsive and powerful when you need it most.

The Factory 4.1 muffler itself is constructed from titanium with an anodized finish, which means it's not only lightweight but also built to handle the rigors of off-road riding. The accompanying Powerbomb header, sold separately, is made from durable stainless steel, ensuring it can withstand plenty of abuse. This muffler comes with a 94dB insert, which is important for meeting sound regulations at many tracks and riding areas. It’s a well-built piece that’s designed to make a real difference in your bike’s performance.

When you're installing this, remember that exhaust systems can be a bit tricky. It's always a good idea to check the manufacturer's installation instructions to ensure everything is properly sealed and secured. This muffler is a key component for anyone serious about improving their CRF150R's performance.