Gen 5: 2016 -> Thoughts on M4 GP Exhaust - Kawasaki ZX-10R.net
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post #1 of 29 Old 02-26-2017, 11:52 AM Thread Starter
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Thoughts on M4 GP Exhaust

Hello!

What are your thoughts on the M4 GP Exhaust? Read online that even though it's a slip-on, it deletes that stock catalytic and comes with an O2 oxygen sensor bung. Will that get my ECU to start acting funny or idle weird? I'd hate to have to tamper with my ECU.

Thanks,
Sam
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post #2 of 29 Old 02-26-2017, 12:12 PM
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Originally Posted by G37Sam View Post
Hello!

What are your thoughts on the M4 GP Exhaust? Read online that even though it's a slip-on, it deletes that stock catalytic and comes with an O2 oxygen sensor bung. Will that get my ECU to start acting funny or idle weird? I'd hate to have to tamper with my ECU.

Thanks,
Sam
Good exhaust, But you will have to have the ECU flashed!!! Bike already comes lean to pass epa BS!!!Adding the exhaust will only make it run leaner..
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post #3 of 29 Old 02-26-2017, 12:26 PM Thread Starter
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Good exhaust, But you will have to have the ECU flashed!!! Bike already comes lean to pass epa BS!!!Adding the exhaust will only make it run leaner..
Even if I kept the stock cat on? I'd hate to experiment with tunes on a brand new bike
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post #4 of 29 Old 02-26-2017, 12:30 PM
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Even if I kept the stock cat on? I'd hate to experiment with tunes on a brand new bike
If you leave the cat on and just do a slip on you could get away with it, remove the cat and you SHOULD get the ECU flashed...Like I stated they come lean from the factory..

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post #5 of 29 Old 02-26-2017, 12:33 PM Thread Starter
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Thanks for your help Scot! I'm assuming power commander with an off the shelf map would do? I'm not looking to milk the engine for power just safe enough to not melt a piston or start knocking.
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post #6 of 29 Old 02-28-2017, 12:46 AM
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I'm spamming my 2-cents (and that's more than what it's worth)

I prefer a quiet exhaust, not just for hearing protection, but for pissed off people and cager protection. In my opinion riding on street is a skill where you navigate who you are going to piss off and when. Ideally it is never, which means you only ride track.

However if you ride street, loud pipes really only save you when you are not aware of the situation you are in, which should never be the case. Mistakes happen, and I get it, but we also like to have fun, and loud pipes in my opinion will absolutely reduce your fun, and only bring extra unwanted attention to you.

I much prefer slipping through unaware, then a cager fully aware of me and trying to block me on purpose because they are raging.
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post #7 of 29 Old 02-28-2017, 08:09 AM
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I did not want to mess with ECU and fueling issues.

I also did not want an obnoxiously loud exhaust (the M4 is IMO).

But I wanted something that looked nice, was lighter than stock, and sounded better than stock.

Last edited by TennisFreak; 03-07-2017 at 10:19 AM. Reason: done
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post #8 of 29 Old 02-28-2017, 08:33 AM
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I run the m4 gp on my street bike and its extremely loud which i love, Sounds amazing imo. like you mentioned i dont think they make a version that does not remove the stock cat. I would just recommend sending your ecu out to a tuner that will reflash it. Dont mess with power commanders and that kind of stuff. If youre in the US your bike is running with a rope tied around its neck, if not you just need to simple tune, maybe more but not 100% sure since im state side.
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post #9 of 29 Old 02-28-2017, 12:16 PM
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To reiterate some of the comments above, the M4 GP is insanely loud. As in it will piss off your neighbours and set off car alarms loud. The low mount design of the GP exhaust puts it in the same location as the catalytic converter so that will be removed out of necessity. However, you want to ditch your cat because it's such a power restriction. I flashed my bike before removing my cat but once replaced it with a link pipe the power gain was really noticeable.

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post #10 of 29 Old 02-28-2017, 02:44 PM Thread Starter
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Thanks guys, I'm actually in Dubai and found a reputable tuner who recommended a PCV, seems like the popular solution here for fueling adjustment.

To be honest, I had the M4 GP on my ZX6R and absolutely loved it: https://www.instagram.com/p/BQp-TL-hANu/

I'd much rather be loud and heard to be honest, gets all the idiots texting and driving to drop their phones and pay attention at least, scares camels away too haha
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