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Yoshimura RS-4 Comp Series Slip-On Exhaust

Retail: $395.99 - $425.99
$359.99 - $384.99
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Product Description

The RS-4 not only increases power and is light, but it also has a lower centralized mass coefficient to provide better handling. 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. This design makes for a quieter muffler with improved mid to top end power.

  • Aluminum pentagonal shaped muffler sleeve and aluminum mount bracket.
  • Features a polyresonant duplex chamber, a two-staged stepped baffle, and an inovative carbon cone and cap.
  • Durable high-grade stainless steel tail pipe.
  • Considerable weight reduction.
  • Carbon fiber end cap comes with a 94 db USFS-approved Spark Arrested insert installed in the muffler.
  • Step-by-step directions and all necessary hardware included for an easy installation.
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Overall
Durability
Ease of Installation
Performance
Power
Style
Top 1000 Contributor
Location: San Jose, CA
Wake Up Your Bike!!
After buying my 2011 yz450 I began researching what exhaust worked best on the bike. Everywhere I looked they raved about the Yosh and its massive power increase across the board. I decided to order the slip on and find out for myself before I went and bought the full system. Once installed and remapped the EFI the bike pulls longer in every gear, comes out of corners quicker looks great and sounds awesome without being too loud. I am very happy with my choice and recommend this pipe if you want to get those extra ponies.
Overall
Location: Southern Oregon
Sweet
Great Buy ,Good Price, Sweet Sound, And a Big pickup on the low end makes the RMZ 250 much more snappy on the low end than stock, We think this was a great investment for the bike and lets us stay in stock classes.
Overall
Durability
Ease of Installation
Performance
Power
Style
Top 250 Contributor
Location: Santa Fe, NM
Excellent
If you're on a budget and can't afford a full exhaust system, this Yoshi slip on is your best option for the 2010 CRF250R! For the price you really can't beat it. For a slip on it's really impressive! It adds over 1 horsepower, improves the weak bottom end and only adds power to the weak spots. It doesn't trade or take away power anywhere (like some other exhausts). It's also a great looking and premium quality exhaust. Motosport.com has an amazing price on this exhaust too!
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Total Questions (1)
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carl1 Over 3 years ago
Does the yoshimura RS4 slip on include the spark arrestor?
Over 3 years ago
yes it does go to yoshimura's web site it has all the specs.
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