The M4 2015 Yamaha R1 GP Mount Slip On Exhaust System installs in a snap and keeps the stock catalytic converter in place which is key for many street applications. The GP2 Muffler cleans up the look and produces a exhaust note that puts a smile on your face without breaking the budget!
Note: M4 Recommends re-flashing your stock ECU to unleash the full potential of all M4 products on the 2015 and up Yamaha R1.
The M4 Exhaust Can for this application includes a Stage 1 part # Q1 (Installed). If you would like to reduce the db levels of this system Optional Stage 2 part # Q3 Quiet Inserts are sold separately and are available for purchase from SportbikeTrackGear.com using the link found below.
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| M4 Exhaust Quiet Insert (Db Reducer) |
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| Emissions Notice to Customers in California |
Important Emissions Notice to Customers in California
The State of California prohibits the offer for sale, sale, or installation of an aftermarket part, which alters or modifies the original design or performance of a motor vehicle's pollution control devices or systems, unless the aftermarket part has first been exempted from the state's anti-tampering laws and been issued an Executive Order (EO) number by the California Air Resource Board (ARB). Legal in California only for racing vehicles which may never be used, or registered or Licensed for use, upon a highway. Any California Residents who order this M4 Exhaust from Sportbike Track Gear llc agree they are doing so with the intention of using it on a closed course as outlined within the California Notice.
Write Review
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M4 R1 slip on exhaust
Exactly what I was looking for.
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M4 GP2 slip on exhaust
It was easy to install. Not as loud as I would have liked but after removing the silencer it sounds better
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R1 M4 Slip On Exhaust
Item received in good condition. It come with the installation guild. Good Service
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M4 slip on
Excellent sound I mounted it literally with one screw
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Exhaust note is great!
The M4 exhaust sounds so crisp on my 2016 r1!!! Paired with the midpipe, I could feel the difference in how the bike responses and could tell it was breathing a lot better! I rode with the dB killer in and out and WOW what a difference. I enjoy it without the silencer but it definitely needs at least the Stage 1 for trackdays!
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