Looking for a quiet exhaust system for your CRF450X / CRF450RL / CRF450L? The FMF Q4 is your answer.... from our testing, with the spark arrestor installed, it's barely louder than the stock exhaust.
This package deal consists of the FMF Q4 Hex Slip-On muffler and the FMF MegaBomb header pipe. This Q4 system is the quietest full exhaust available for these bikes, while still improving performance over the stock exhaust, and also saving weight.
2019+ Honda CRF450X
2019-2020 Honda CRF450L **
2021+ Honda CRF450RL **
** When installing this exhaust on a CRF450L/RL, you MUST tune the bike appropriately with something like our Vortex ECU.
As mentioned above, this is the quietest aftermarket exhaust you can get for these bikes. The sound is really good... and with the spark arrestor installed, it's just barely louder than the stock exhaust. With the spark arrestor removed, it's louder, but not quite as loud as a Yoshimura RS-4 or Pro Circuit T-6.
Changes to FMF Q4 Muffler and MegaBomb header:
Sometime in 2023, FMF changed the color of the muffler canister from silver (to this dark grey color. Additionally, the MegaBomb header now has the flattened Power Bulge like the ones you see on motocross bikes and is no longer the rounded shape. So be aware that some of our project bike photos and videos will show the old style muffler and header, rather than the newer updated ones.
PACKAGE INCLUDES THE FOLLOWING...
One (1) CRF450X FMF Q4 Hex Slip-On Muffler:
Constructed from aircraft grade aluminum and high strength stainless steel
Removable USFS spark arrestor included
Pounds lighter than stock (total weight 5.8 lbs)
Quietest aftermarket muffler available for your CRF!
Includes mid pipe insert if you want to use with the smaller stock header pipe (fits 450X header only)
Meets USFS and FIM World Enduro sound regulations
One (1) CRF450X FMF MegaBomb Header Pipe:
Stainless Steel Construction
Ideal for use with FMF PowerCore 4 and Q4 Mufflers
NOTE: This FMF exhaust system is a performance product and designed for closed course competition use only. By purchasing this product you understand that the parts, installation and performance modifications are not emissions or noise compliant and are for closed course competition use only.
Honda CRF450L FMF Q4 / MegaBomb Video:
** IN STOCK - Very limited availability. We only have a few of these systems in stock, after waiting 12 months for the MegaBomb header pipes. Once these are gone, I have a feeling it will be another long wait. If you want the quietest exhaust for your CRF450X/L/RL, get one while they last!! Usually leaves our warehouse in 1-3 business days.
NOTE: We cannot ship this product to California, Alaska, Hawaii or Canada. If you are from any of these locations and order one, it will have to be removed from the order.
*** FOR A LIMITED TIME ONLY - SPECIAL PRICING! ***
Special pricing available on select FMF exhaust systems. Please GO HERE for details.
WARNING! - Motor sports can be extremely dangerous, injury or death can occur. No warranty is made or implied regarding any product sold by Devo Tech, Inc. / SoloRacer.com to protect users from injury or death. The user assumes all risks. Please read the rest of our Legal Disclaimer before ordering.
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