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Exhaust› Mufflers and Resonators

FMF

Q4 HEX Slip-On Muffler

$479.99 $431.99 Save $48.00

SKU: 041570

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The FMF Racing Q4 HEX Slip-On Muffler is an evolution in off-road exhaust technology, designed for quiet performance. It features intricate chambers, baffles, and a proprietary packing material to deliver the best-performing quiet muffler. This muffler is made in the U.S.A. and is pounds lighter than stock.

This slip-on muffler is constructed from aluminum and stainless steel, with a natural finish.
Show original supplier description
The FMF Racing Q4 HEX Slip-On Muffler represents the next evolution in off-road exhaust systems, focusing on high-performance quiet technology. This muffler is engineered with intricate chambers, baffles, and a proprietary multistage packing material to achieve the highest performing quiet muffler available on the market. Riders can expect to feel the power without excessive noise, enhancing the overall riding experience. Constructed from durable aluminum and stainless steel with a natural finish, the Q4 HEX is built for rugged off-road endurance. It weighs significantly less than the stock muffler, contributing to improved overall performance. The product is proudly made in the U.S.A. This specific FMF Q4 HEX Slip-On Muffler (041570) is designed as a direct fit for the 2017-2018 Honda CRF250L Rally. Its slip-on configuration simplifies installation compared to a full system. The midpipe is made of stainless steel, ensuring durability and corrosion resistance in demanding environments. While this muffler offers enhanced performance and reduced sound, it's important to note that it is intended for off-road/track use only. Always check local regulations regarding exhaust noise and emissions for street use.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandFMF
Part Number041570
CategoryExhaust
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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