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Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R 2012-2016
  • Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R 2012-2016 - Stainless Steel
  • Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R 2012-2016
  • Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R 2012-2016
  • Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R 2012-2016
  • Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R 2012-2016

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Video Review

Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R 2012-2016 Videos

This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.

Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R

While the RS-4 Exhaust was debuted as Yoshimura's premier exhaust for off-road racing applications, R&D couldn't stop there. They have mated this sophisticated and stylish muffler to compliment the styling of the new bike. The RS-4 is pentagonal shaped muffler that features a carbon fiber cone end cap, two staged stepped baffle and striking good looks. The RS-4 muffler features a new front cap design that functions as a polyresonant chamber. thus creating a more quiet muffler with improved mid to top end power.

Along with improving sound and power, this system moves the muffler weight lower and closer to the bike for improved handling and weight distribution. Yoshimura continues to provide the best in performance exhaust systems.


  • Pentagonal-shaped sleeve
  • Front muffler cap functions as a polyresonant chamber which helps reduce noise
  • Two-stage stepped baffle
  • Carbon fiber end-cap
  • Stainless steel headers and mid-pipe (applicable models)
  • Made in the USA


This Product Fits:
Ninja 650R 2012, 2013, 2014, 2015
Ninja 650R ABS 2013, 2014, 2015, 2016
Product Style RevZilla Item # Manufacturer Product # Availability
Stainless Steel / Full System 872184 146500D520 In Stock: Ships next business day


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Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R 2012-2016 4.9 5 15 15
A Lion Roaring in the Jungle Have you watched Lion King? Well this RS4 Exhaust is like Simba. Yoshimura just made my Ninja 650 loud and fierce. As I zoom by cars, I can hear it roar with fierce sound that echoes through the plains and the jungle. Meet Yoshimura RS4, King of the Jungle. August 23, 2016
Nyoooooom WOT this thing sounds phenomenal. that gargling, throaty sound, not like the Two-Brothers pipe that will give your bike that rice-burner sound. August 23, 2016
BEAST Compared to stock it's lighter flexible because it's 2 pieces and the sound is amazing I do not have a power commander and its still very good June 14, 2016
Absolutely AMAZING! Just purchased this for my 2015 Ninja 650 ABS. Couldn't ask for a better experience as a rather new rider. Received it in just less than 24hrs with regular standard shipping. It looks absolutely amazing and sounds even better than expected. Not obnoxiously loud, but gives it a much lower/tougher sound that you can't resist after dealing with the very quiet stock exhaust. Installation couldn't have been any easier and I know very minimal about mechanics. Because it is so much smaller/lighter than the stock you can easily notice the little weight difference on the bike. You can also easily feel the difference in the slightly more HP that you get with this. No doubt will recommend to anyone and everyone. Very impressed and couldn't be more happy. GREAT BUY!!! March 10, 2016
My first major mod This was my first time doing anything more than a fender eliminator kit, and it went off without a hitch. The directions are very clearare and easy to understand, and the parts fit my bike perfectly. The only tough part was removing the baffle (silencer) to get that full sound, but otherwise everything went smoothly. Looks great on my bikeys and the sound is savage AF! August 24, 2015
Transformed my bike from a house cat to a ferocious jungle cat I was debating between this and the other exhausts for the Ninja 650s for quite some time for my 2014 Ninja EX650. Watched all the videos I could find and read all the reviews. When you're dropping over 500 big ones you want to make sure you get something you like, right? Well, I definitely like! This exhaust is a monster! It's got a very deep growl to it. Sounds absolutely amazing and now people can actually hear me coming down the street. I removed the silencer so I can't comment on what it sounds like with it in, but I would recommend removing. Pretty simple, unscrew the allen bolt and then comes the fun part of getting it out. I personally took both my thumbs and stuck them in the pipe and just pulled until it came out far enough that I could get a pair of channel locks around it and wiggled it out. Just make sure you tape off the channel locks so you don't scratch it to pieces. August 14, 2015
Excellent upgrade! This is the best sound to performance ratio for the ex650 I have found, and let me tell you I did 6 months of research before I made my purchase. The silencer was a bit difficult to take out, more so than the Internet made it seem but well worth it. The installation was easy except for one bolt is hidden and very hard to reach with anything but a short socket with a knuckle adapter. So I recommend buying one if you're going to install it yourself. The instructions recommend cleaning the pipes with alcohol before you start it for the first time to stop the fingerprints from messing up the finish...it made a huge nasty swatch of corrosion on the header. I do not recommend you do that, maybe just a good dry microfiber rag instead. Other than that great improvement for the ex650 looks great as well! May 14, 2015
The Perfect Exhaust. It's a beast. The sound is so good and the price is excellent. You don't even need a power commander or juice box for this exhaust. May 7, 2015
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