Rocket Exhaust produces premium quality, made in the USA exhaust systems. The unique “octagonal” shape of the muffler has superior noise canceling features; larger packing volume is stronger, lighter and has better tire clearance than conventional designs. If you need to reduce the decibel level Rocket offers optional Stealth Core inserts. We also have a full line of performance engine parts, Stage 1, 2 and 3 engine packages with CNC ported cylinder heads, engine rebuild services and custom Vortex ECU maps for our engine kits. Please contact us for more information.
Standard 250F/350F muffler length 14.5 inches, Standard 450F muffler length 15.5 inches. CRF 250/450 dual system muffler lengths 12″. Custom lengths available.
The Rocket Exhuast
The muffler housing is available in brushed aluminum, black hard anodized aluminum and carbon fiber. The unique muffler mounting system insures a “happy” fit utilizing our adjustable CNC machined hanger bracket and precision mid-pipe to muffler slip-fit.
Head and mid-pipes are constructed from aircraft quality 304 stainless steel. Each model is dyno tuned and track tested to optimize performance and power gains using “stepped” and or “tapered” tube designs.
Thin wall 304 stainless steel head and mid-pipe construction
6061 aluminum or optional lightweight carbon fiber muffler housing
Race legal versions available
(12″-17″) and multiple core designs available
Approved spark arrester optional
Hanger bracket and end cap nozzle
We take care of all our customers. If it is broken, we fix it.
12″, 14.5″ to 15.5″ (Custom Lengths Available)
mm (varies per length and core type)
mm (varies per length and core type)
lbs (varies per length and core type)
CNC Machined 6061 Aluminum
dB (std systems meet AMA 94 db, FIM 2 Meter Max avail (not for all bikes) (note larger outlet nozzle and or core dia and shorter muffler housing will add more sound db)
94 dB with Stealth Insert
(every bike is different)
Fits The Following Bikes:
Honda CRF250R 2020
Honda CRF250RX 2020
The T-6 Stainless Steel Dual Exhaust System for the 2020 CRF250R/RX offers maximum performance and is constructed of stainless steel throughout the head pipes, mid pipes and end-caps while the canisters are aluminum. The T-6 is perfect for any closed-course or off-road racer looking for improved performance, durability and a professional look. More features offered by the T-6 is the ability to meet AMA amateur racing sound requirements and that it comes equipped with United States Forest Service (USFS) approved spark arrestors making it easy to alternate between off-road and closed-course racing.
- Offers the same performance as the Ti-6
- Lower cost and increased durability
- Ideal for closed-course or off-road racing
- Stainless steel throughout head pipes, mid pipes and end-caps
- Aluminum canisters construction
- Superior strength mounting brackets for durability
- Asymmetrical muffler configuration for increased packing volume
- Removable USFS approved spark arrestors
- TIG precision welding
- Made in the USA
As soon as I fired the bike up with the new exhaust it was clearly a bit louder, not obnoxious, but a nice, throaty sound that was deeper and less raspy. I tested the stock system back to back with the Yoshimura system on the same days, so it was cool to see the places on each track where the bike really felt different. The most noticeable place the bike felt better was out of tight inside ruts that exited up faces of jumps. With the stock system I had to slightly slip the clutch all the way up the lip (to be able to clear the jump). When I bolted on the Yoshimura system I could leave it in the same gear and just use the meat of the new found Yoshimura power to pull me up and over those types of jumps. Some areas of the track I had to be in second gear and then scream the bike on the exit of corners with the stock system. With the Yoshimura system I could now be a gear higher at times and use that extra meat to get me out of a loamy berm more efficiently. From mid to top end I didn’t notice any real added power gains, but I also didn’t feel like the top end suffered in order to get the added bottom end snap that I received with the Yosh. I will say that the mid rpm response is slightly crisper when in third gear as well as the recovery in third gear through deep corners. Bolting on the Yoshimura full system will not make your Honda as responsive as a Yamaha YZ250F, but it will get you a little added excitement that you could be looking for. Plus the Yoshimura mufflers look much cooler than the stock ones.
If you have a 2020 Honda CRF250R and feel like you’d like a bit more bottom-mid range power, I’d definitely look into the RS-9T stainless system. Yoshimura offers three options, the slip on mufflers ($809.00), the full stainless system ($909.00), and the full titanium system ($1499.00). Admittedly none of these are super inexpensive options, but it’s one of the few things in today’s four-stroke world that can provide a true bolt on benefit.
You can check out yoshimura-rd.com for more of you can contact me at [email protected] if you have any questions.
Crf250r exhaust 2020
.2020 CRF250R With Dual FMF Factory 4.1 RCT Mufflers
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