FMF
FMF Racing Q4 HEX Spark Arrestor Slip-On Exhaust
Item: #136189 | Part Number: Not Selected51% off
$399.99 - $750.99
$366.99 - $750.99
Description
FMF is the leader in high performance quiet technology and the Q4 HEX is the next evolution in off road exhaust. The Q4 employs intricate chambers, baffles and proprietary multistage packing material making it the best performing quiet muffler available. With the Q4 you don't need to hear the power,...
FMF Racing Q4 HEX Spark Arrestor Slip-On Exhaust Item # 136189
Description
FMF is the leader in high performance quiet technology and the Q4 HEX is the next evolution in off road exhaust. The Q4 employs intricate chambers, baffles and proprietary multistage packing material making it the best performing quiet muffler available. With the Q4 you don't need to hear the power, just feel the power!
Features:
- Less sound equals more ground
- Meets USFS and FIM World Enduro sound regulations
- Power gains throughout the entire rpm range
- Spark arrestor included
- Pounds lighter than stock
- Rugged design for off-road endurance
- Only US manufacturer to offer dedicated quiet exhaust systems
- Made in the USA
- Compatible with FMF or stock header
Part Numbers for FMF Racing Q4 HEX Spark Arrestor Slip-On Exhaust
Fitment for Parts FMF Racing Q4 HEX Spark Arrestor Slip-On Exhaust
This part fits the following vehicles:
Reviews
Rated 5 out of
5
by
JohnofGlenelg from
Looks soooooo much better than stock!
Purchased March 2020 from Fortnine and was shipped quickly to Atlantic Canada with no issues. The side number plate adapter was included as well as the reducer insert to match the stock header. Install was fairly easy with a little muscle to line the bolt holes up. Used copper exhaust sealant and the stock clamp. The weight difference is quite noticeable as it takes both hands to lift the stock can, and only one for the FMF.
Haven't run it yet as we still have ice and snow but the weight, overall look and fit/finish makes it worth it in my books.
Date published: 2020-03-21
Rated 5 out of
5
by
Justride from
Fits 450rl great!
Bought a 450x header to use with this for my 450rl
Just had to grind off the little tab near the bend and it was good to go!
Date published: 2022-06-21
Rated 5 out of
5
by
Echo from
Like having a new bike
Bought this and the megabomb header for my 2012 CRF250L. Went on in 20 minutes and transformed the bike completely for the better. Tons more low end and extra top end too. Beautiful exhaust tone too.
Date published: 2019-06-14
Rated 5 out of
5
by
BigDee from
FMF exhaust
Great exhaust, great build quality and sounds excellent. Not to loud and doesn’t have that annoying bark sound that some other motocross exhausts have. Well worth the money to me.
Date published: 2020-03-31
Rated 5 out of
5
by
chris3058 from
Worked great for an XC bike!
Bought this slip on last fall for my '12 YZ250F that I primarily trail ride weekends and some week days. It was on sale when I purchased it and for the money - was a good buy.
Where I am there are random noise checks / inspections by the police and trail wardens so I looked long and hard for a "quiet" / USFS spark arrestor approved pipe. I like it and will now be buying the header.
Date published: 2019-02-28
Rated 5 out of
5
by
Mitch from
Great muffler
Fit well, looks nice, and a much nicer sound than the stock muffler. Louder but not too much louder. I didn't notice a weight difference.
Date published: 2025-06-02
Rated 4 out of
5
by
Meanie from
Absolutely fits 2025 yz250FX
If you're wondering it this fits a '25 yz250fx, it does. Simple slip on install. Needed spark arrestor & found this the simplest solution. Works great, not exactly quiet....but you probably didn't buy this bike for "quiet'. Quick delivery, good job Fortnine.....now update the details that this fits the '25 yz250fx....cheers.
Date published: 2025-05-27
Rated 5 out of
5
by
Mark from
FMF Pipe
Great sound. Fits good and feels very solid. Would recommend
Date published: 2024-05-28
Questions
Will this fit on a 2019 Dr 650?
No. Simply enter the year, make and model of your bike on the product page to check fitment. You will see either "Guaranteed Fit" or "Not expected to fit".
Date published: 2024-03-28