Yoshimura RS-4 Stainless/Aluminum Full System

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Yoshimura RS-4 Stainless/Aluminum Full System
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    Yoshimura RS-4 Stainless/Aluminum Full System

    Our Price: $343.00$652.50

    MSRP: $639.00 - $725.00 - You save up to $296.00 (46% off)

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    Details

      When you’re looking at putting the Yoshimura RS-4 Stainless Aluminum Full Exhaust System on your dirt bike, you’re looking at Yosh’s premium dirt bike exhaust designed for the racer that wants to squeeze every last bit of power out of their machine. The RS-4 Full System starts right at your engine with a tapered header pipe that optimizes exhaust flow for both efficiency and power output.

      Exhaust gas then works its way back into the pentagonal muffler where the polyresonant chamber tones the exhaust note down and pumps up power when you hit the mid and high ranges. Last but not least, the carbon fiber end cap rounds out the RS-4 with a touch of wicked looks and an AMA-approved sound insert that comes installed and ready to meet any race regs.

      Specs:
    • Race-ready stainless steel and aluminum exhaust system for your 4 stroke dirt bike
    • Increases mid and high-end power
    • AMA-approved sound insert comes installed
    • Tapered header pipe optimizes exhaust flow
    • Lightweight aluminum pentagonal canister body
    • Polyresonant chamber lowers decibels
    • Stepped, two-stage baffle
    • Carbon fiber end cap

    Yoshimura RS-4 Stainless/Aluminum Full System Reviews

    Each review submitted enters you into a
    $100 gift card monthly drawing and a
    $500 gift card quarterly drawing!
     
    4.8 / 5.0
    19 Reviews
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    16
    2
    1
    0
    0
    Value
    4.7 / 5
    Durability
    5.0 / 5
    Ease of Installation
    5.0 / 5
    Fitment
    5.0 / 5
    Performance
    4.0 / 5
    Finish
    5.0 / 5
    Features
    4.3 / 5
    Recommend it?
    Yes (2)
    No (1)
    Value
    5 / 5
    Durability
    5 / 5
    Ease of Installation
    5 / 5
    Fitment
    5 / 5
    Performance
    5 / 5
    Finish
    5 / 5
    Features
    5 / 5
    Recommend it?
    Yes
    Great exhaust
    This is not just a great value but a great exhaust period. Titanium might be a bit lighter but never holds up to stainless. When titanium gets hot it dents very easily. My last Ti exhaust had little dings in the head pipe after 2 races. If you’re rich and can replace Ti parts all the time go for it, otherwise this is the pipe for the masses.

    -m- KTM--
    March 5, 2018
    Murphys , CA, US
    Purchased
    over 2 years ago
    Value
    5 / 5
    Durability
    5 / 5
    Ease of Installation
    5 / 5
    Fitment
    5 / 5
    Performance
    2 / 5
    Finish
    5 / 5
    Features
    3 / 5
    Recommend it?
    No
    Looks aren't everything
    It looks good and fits well, but didn't notice any power gain from this pipe. It was disappointing, because I've had yoshimura systems before that worked great.
    November 8, 2017
    Hustisford, WI, US
    Purchased
    6 months ago
    Value
    4 / 5
    Durability
    5 / 5
    Ease of Installation
    5 / 5
    Fitment
    5 / 5
    Performance
    5 / 5
    Finish
    5 / 5
    Features
    5 / 5
    Recommend it?
    Yes
    Top notch quality
    The quality/fit&finish on this is fantastic. Installation was super easy, and the fitment is perfect. Noticeable power gains (with my engine package, at least), and quieter than stock...absolutely nothing bad to say about it.

    -m-2015 YAMAHA YZ250F--
    January 1, 2017
    Denver, CO, US
    Purchased
    1 year ago
    Hold on
    This exhaust bolted right on with no issues. Looks good, the added power in the midrange is AMAZING! Still a bit loud but did change the tone.

    Machine this part was bought for: 2011 KAWASAKI KX450F
    February 5, 2015
    Nampa, ID, US
    Age: 25-44
    Gender:
    Male
    AWESOME EXHAUST
    One of the best upgrades I got for my bike. Puts out more power and makes the bike sound deeper and reduces the loudness of the stock pipe a litte bit. Did I mention it looks good to?!

    <br>This is one of the best upgrades I put on my bike. Cheaper than most other stores. Puts out a noticeable power upgrade. Makes the bike sound deeper with less noise Sounds way better than the stock pipe. Sheds some weight to. Did I mention that it looks good also?!

    Machine this part was bought for: 2010 HONDA CRF450R
    December 30, 2014
    PA
    Fantastic Pipe!
    I simply love this pipe. It seemed to me to open up the mid range the best. The sound is pretty loud but I love it.

    Machine this part was bought for: 2008 YAMAHA YZ250F
    December 17, 2014
    FL
    Sweet exhaust
    This thing bolted on and fit perfectly - even came with a spring puller tool.

    Sounds and looks awesome- not positive about performance yet- had a flat early that day - switched bikes

    Machine this part was bought for: 2014 KTM 350 SX-F
    November 9, 2014
    TX
    Super Nice
    Yoshimura does things right. This thing bolted right up. The quality is unmatched. The sound is deep but not to loud. Comes with spark arrester. The fit and finish is beyond words. Thanks

    Machine this part was bought for: 2011 KAWASAKI KX450F
    September 3, 2014
    FL
    Great soumd and power
    This was one of the best exhausts i have ever baught. It holds up very good on the sand or in the mud and trails. I ride trails in norther mi and it has a great sound and proforms good.

    Machine this part was bought for: 2012 HONDA CRF450R
    May 2, 2014
    MI
    Awesome Pipe!!!!
    I just bought my bike and the pipe came with it, so I don't know what it's like without it. But I absolutely love it! I love the way it sounds and adds great power to the bike. Everyone I've shown the bike to say they love the pipe on it. Would recommend to anyone!

    Machine this part was bought for: 2010 HONDA CRF250R
    May 1, 2014
    UT
    Each question or answer submitted enters you into a:
    $100 gift card monthly drawing and a
    $500 gift card quarterly drawing!
    Start typing your question and we'll check if it was already asked and answered. Learn More
    Browse 9 questions Browse 9 questions and 11 answers
    Does this full Yoshi exhaust (2015 KTM 350 SXF) come with a removable spark arrestor insert?
    Mike M on Nov 27, 2016
    is this the full exhaust system? Like the header to all the way back to the back guard ?
    A shopper on Feb 6, 2018
    BEST ANSWER: Yes it is! Its nice. The new muffler is not completely compatible with stock header, fyi. But it is a full system so no worries.
    Will there need to be any tuning or remapping for a 2018 yz250f?
    A shopper on May 1, 2018
    BEST ANSWER: No, it’ll run fine with the factory mapping and sound much better than a factory exhaust
    Will this pass ama and fim inspections at the nationals?
    Joshua B on May 14, 2018
    BEST ANSWER: AMA-approved sound insert comes installed
    is this the full system header and pipe ?
    A shopper on Mar 21, 2018
    BEST ANSWER: Yes I bought it for a 2015 KTM 450sx-f factory edition and I got the FULL SYSTEM.
    Note it says Stainless/ Aluminum Full System ^
    Header is stainless and the canister is aluminum
    Can I run the yoshimura in the woods ?
    Randy B on Mar 4, 2018
    BEST ANSWER: It depends on your state. Each state has different off road regulations, you will have to see what those are and read the product details.
    This full exhaust fits on kx 250f 2009?
    A shopper on Apr 28, 2017
    BEST ANSWER: To see if this part will fit your machine please enter the make, model, and year into our "Choose a vehicle" drop down boxes found above the product image. If your machine is not listed, we may not carry the right item for your application. If you have a 2017 year model but don't see your machine as an option, please contact a tech via Live Chat or call us at 1-800-336-5437 for assistance.
    I bent my yoshi header pipe, can I purchase just the header pipe?
    Tyrone K on Mar 27, 2017
    BEST ANSWER: Unfortunately we do not sell the Yoshimura header separately. I believe Yoshimura sells it separate and you may want to contact them.
    2009 crf 450 full yoshi system where can i get spark arrestor insert ?
    A shopper on Jan 22, 2017
    BEST ANSWER: We don't carry a spark arrestor for this exhaust, but the MFG number for the spark arrestor is #SA-04-K.
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