Yoshimura RS-4 Titanium Full System Exhaust

Yoshimura RS-4 Titanium Full System Exhaust
Yoshimura RS-4 Titanium Full System Exhaust

$850.46 - $940.50
10% Off - Save up to $104.50

  • Description
  • 7 Reviews
  • 12 Questions
  • Fitment
Description Item #YSH000Q

The work that went into developing the RS-4 muffler design paid big dividends in 2010 with Ryan Dungey winning the AMA 450 Supercross and Motocross Championship series as a rookie in the same year, and again in 2012 with the Yoshimura-backed GEICO Honda team winning both 250 Supercross Lites titles. That same R&D has been directed to developing the current generation RS-4 - a unique design that provides an unrivaled combination of power and a quiet exhaust note. The RS-4 features a polyresonant duplex chamber, a two-staged stepped baffle and an innovative carbon cone end cap.

  • Pentagonal-shaped muffler sleeve and aluminum mount bracket.
  • Front muffler cap functions as a polyresonant chamber which helps reduce noise.
  • Two-staged stepped baffle.
  • Innovative carbon cone end-cap.
  • Durable high-grade titanium tapered header and mid-pipe.
  • Considerable weight reduction.
  • Step-by-step directions and all necessary hardware included for an easy installation.
  • Note: Stainless systems come with both a 94db and AMA 2-m Max sound insert. Titanium and Carbon Fiber systems are equipped with a 94dB sound insert installed and the 2-Meter max insert is optional (sold separately).

Yoshimura Exhaust Series Descriptions:

Race Series: If you're looking for that competitive edge, look no further than Yoshimura's Race Series. These exhaust systems are designed with nothing but power in mind. Each Race Series system is developed in accordance with noise compliance regulations imposed by most racing sanctioning bodies worldwide. FOR CLOSED COURSE COMPETITION ONLY; NOT INTENDED FOR STREET USE.

Signature Series: Introducing Signature Series by Yoshimura - an offering of exhaust systems that a dealer can install with confidence. The Signature Series lineup is the answer for today's dealer who is faced with a challenging marketplace. The applications for the Signature Series line cover the entire powersports spectrum, including many off-road applications. Everyone of Yoshimura's Championship Winning Motocross exhaust systems and nearly all of the ATV / Side-by-Side applications are all members of the Signature Series Family. All Signature Series components are tested, documented, and marked as required by federal and state regulations. (CARB/EPA tail-pipe emissions compliant; all applications are marked with appropriate EPA noise emissions labels and certified by an independent laboratory for EPA noise compliance.)

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7 Reviews
5.0 out of 5 stars
5 Star   7 4 Star   0 3 Star   0 2 Star   0 1 Star   0

all i can say is wow i mean the bike feels better sounds better and u can feel the power increase installed this on my 2012 crf250r and i am just speechless

Verified Purchaser
Tampa, FL
Awesome pipe!!!

I put this pipe on my Crf450 and it dramatically improved the throttle response, and totally eliminated flameouts/pop stalls.

St. Charles, MO
Best purchase for exhaust

Exhaust fits perfectly on the bike, makes coldstart a lot easier, give the power a little more of a "kick" to the bike, and give it a beefier sound.

Top 250 Contributor
Durability   Ease of Installation   Performance   Power   Style  

This pipe adds tons of power! I was really surprised how much i noticed it, it added power everywhere. The low end power is really brought to life on my 2010 crf250r. Install was simple and so far after about 5 months I've had no trouble at all. Durability seems good too.

GET IT!!!!!

walkill, NY
Durability   Ease of Installation   Performance   Power   Style  
Well worth the money

i put this exhaust on my 2010 honda 250f. the bike was kinda slow stock but ive never noticed such a power gain from just an exhaust as much as i did with this one. it also sounds great. it sounded like the bike had motor work from just the exhaust. i have a full race motor in it now and this is the best exhaust ive ever ran on any of my bikes! GET ONE!!!!!

Top 500 Contributor
Austin, TX
Durability   Ease of Installation   Performance   Power   Style  
Excellent Product

One of the best products I've purchased and a must have for the '09 CRF450. The '09 CRF450 falls on its face at about 8200RPM, but this pipe adds about 3+hp on the dyno and brings peak power to about 9500RPM which is a massive improvement.

I didn't realize at first, but I thought the included 94db insert was missing when I unpacked everything. Turns out it is pre-installed and you can see it in the product photo. The pics I added are the pipe without the insert (99db)(almost 1hp gain) and the free exhaust plug and spring puller that come with the kit.

Don't bother with the full carbon kit. It only saves 0.2lbs over this full titanium and carbon will breakdown as the packing wears out. This drops over 2.0lbs from the stock unit. Oh and Titanium is the easiest to maintain(clean) material there is. The stainless calls for occassional polish every few hours of use etc..

So far I love this new setup and it looks totally trick!

Yoshimura RS-4 Titanium Full System Exhaust
Yoshimura RS-4 Titanium Full System Exhaust
Top 250 Contributor
Santa Fe, NM
Durability   Ease of Installation   Performance   Power   Style  

For the 09-10 CRF450R this exhaust is amazing! Massive power increases throughout the ENTIRE powerband.I actually have a Pro Circuit T-4R on my CRF450R, which takes away a little bottom and adds a ton of top end (which I prefer for my riding style). I had the opportunty to try/test the Yoshimura exhaust and it adds power everywhere! It's also premium quality and style, as is the Pro Circuit.

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12 Questions
Answered:   12
Not Yet:   0
Q: Is there a big difference between the YZ250F 2014 and 2015 exhaust?
Over 10 months ago
Expert MotoSport Staff
Over 10 months ago
A: The Yoshimura RS-4 Titanium Full System Exhaust would be the same for the 2015 and 2014 YZ250F.
Location: Tiverside
Q: Where can I find the set screw for the RS-4 silencer must have blew out? 2014 RMZ 450?
1 year 2 months ago
MotoSport Staff Expert
1 year 2 months ago
A: I would contact Yoshimura directly at E-mail: seang@yoshimura-rd.com
T: (909) 628-4722 Ext: 410
Location: Perth
Q: Mate selling his Rs-4 yoshimura off a 2010 crf250. Will this full system fit on my 2011 450?
1 year 3 months ago
Expert MotoSport Staff
1 year 3 months ago
A: No. The 2010 Honda CRF250R exhaust would be different than the 2011 CRF450R exhaust.
Q: There is a yoshimura rs-4 (short version like 2009-10) available for my crf 450 2011 ?
1 year 8 months ago
or can i buy the 2010 rs-4 version and adapt to my 2011CRF 450 ?
Top 1 Contributor
1 year 8 months ago
A: No. Yoshimura list pipes for the CRF450R for models 2009-2010, and different part numbers for 2011-2012. The only other exhaust offered from Yoshimura is the RS-4D for your 2011 CRF450R.
Location: Alexandria, LA, USA
Q: Resonance chamber?
1 year 11 months ago
I've seen some of the pros bikes having resonance chambers on the header. Can I get that? Or is that a custom thing?
Expert MotoSport Staff Top 1 Contributor
1 year 11 months ago
A: Yes, companies like FMF and Pro Circuit offer exhaust systems with a resonance chamber. The Yoshimura RS-4 will not have a resonance chamber. I would recommend taking a look at the Pro Circuit Ti-6 system or the FMF Factory 4.1 exhaust system.
Q: Will a rs4 system from a 2011 crf450 fit my 2009 crf 450?
2 years 3 months ago
MotoSport Staff Expert
2 years 3 months ago Location: Portland, OR, USA
A: No, The Yoshimura RS-4 exhaust systems for the 2009 and 2011 Honda CRF450R are different and are not interchangeable. The 2011 exhaust system will not mount up correctly on your 2009 Honda CRF450R.
Location: Lockport, LA 70374, USA
Q: Will this work on a 2011 crf450r with a GET ecu? Or will other mapping be requird?
2 years 5 months ago
MotoSport Staff Expert
2 years 5 months ago Location: Portland, OR, USA
A: The GET ECU should work well with any aftermarket exhaust system. The Performance MAP ready inside for stock bike and with racing exhaust. There may be some tuning required for this particular exhaust system. You can upload different maps for the GET ECU via www.getdata.it
Location: Colorado, USA
Q: Will the muffler fit the stock header?
2 years 6 months ago
MotoSport Staff Expert
2 years 6 months ago Location: Portland, OR, USA
A: This is actually a full exhaust system, it would include the Yoshimura Header pipe. The muffler will only work with the Yoshimura Header, it will not fit the stock header.
Location: Ohio, USA
Q: Does the rs-4 from a 2011 crf250r fit on a 2010 crf250r?
2 years 9 months ago
A buddy of mine has a 2011 and is wanting to sell it to me but i dont want him to ship to me if it doesnt work. Thanks
MotoSport Staff
2 years 9 months ago Location: Portland, OR, USA
A: Yes, the 2010 and the 2011 CRF250R will share the same exhaust systems.
Location: Wichita Falls, TX, USA
Q: Does the RS 4 fit both the 2010 Suzuki RMZ 250f and the 2012 Suzuki RMZ 450f?
2 years 9 months ago
MotoSport Staff
2 years 9 months ago
A: The Yoshimura RS-4 Full System Exhaust - Titanium/Carbon Fiber will not interchange between he 2010 Suzuki RMZ 250f and the 2012 Suzuki RMZ 450f.
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