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Old 09-29-2008, 08:30 PM   #1
magzx12r
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M4 GP Full Exhaust

What's your opinion of the M4 GP full exhaust? I have read mixed reviews. I am interested to know if it will provide power gains from the low end to top end. The dyno chart from M4 shows gains from bottom to top, but I have read that you lose some bottom and mid range with this exhaust. I am looking at this exhaust for an '08 ZX-10R.
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Old 09-29-2008, 08:50 PM   #2
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How much gain we talking?

Say you do the whole system, have to buy the Power Commander, and do all the other upgrades you wanted to before paying for dyno tuning cuz you dont wanna buy a air filter then have to go back.

At the most, a 10hp gain? Is it worth all that has to be put into it?

The most you will feel in difference is the weight loss going to a titanium exhaust system. Weight loss equals:better braking, accerating, control.

the only reason I went to my full system is because I found it for $370. I needed cans due to a rear end. Was it worth it? I missed losing dual exhaust but lost almost 30 lbs w the pair valve removed too. I did the PCM afterwards w a smoother feel and maybe a bit more spunkiness out of the map.

If its for the street, I would honestly do a slip on and avoid the heartaches. If you find a good deal you're happy with, by all means jump on it. Check our sponsorers... they treat us most excellent too...
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Old 09-29-2008, 08:58 PM   #3
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http://www.redtagmotorsports.net/kazx2020m4gp.html

slip-on at 355.... if your catalytic converter is taken off with it, you will already save ALOT of weight...
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Old 09-29-2008, 09:01 PM   #4
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I would go with the slipon, I don't think the M4 full system is offered in titanium or else that would probably be better overall.
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Old 09-29-2008, 09:15 PM   #5
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Quote:
Originally Posted by magzx12r View Post
What's your opinion of the M4 GP full exhaust? I have read mixed reviews. I am interested to know if it will provide power gains from the low end to top end. The dyno chart from M4 shows gains from bottom to top, but I have read that you lose some bottom and mid range with this exhaust. I am looking at this exhaust for an '08 ZX-10R.
Loud as .
You'd do better with Leo Vince or Akrapovic imo.
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Old 09-29-2008, 10:15 PM   #6
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Thanks for the responses. I will probably go with the Akra. I normally put full systems on my bikes instead of slip-ons.
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Old 09-29-2008, 10:18 PM   #7
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I have the slip on my GSXR-1000 and its bad !!!!
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Old 09-30-2008, 06:47 AM   #8
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Quote:
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Loud as .
You'd do better with Leo Vince or Akrapovic imo.
Is it too loud with the quiet insert installed? How does the exhaust perform power wise? I don't want to lose low/mid range, but I am looking for something different.
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Old 09-30-2008, 07:09 AM   #9
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I have the M4 GP slipon on my 06 1K. While it is loud, and mine is track only, it won't win you any popularity contests with the neighbors, and earplugs are the trick! I haven't noticed any loss with mine. I do have a PCII as well
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Old 09-30-2008, 07:10 AM   #10
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I like the M4 GP on 600s for sure. I have not heard on ZX10 yet.
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Old 09-30-2008, 08:12 AM   #11
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Quote:
Originally Posted by magzx12r View Post
Is it too loud with the quiet insert installed? How does the exhaust perform power wise? I don't want to lose low/mid range, but I am looking for something different.
Performance is good, but according to Brooke at M4 the GP style typically does not have an insert.
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Old 10-11-2008, 12:46 PM   #12
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I decided to go with the M4 GP slip on. Picked it up from Motorcycles Unlimited yesterday. Thanks Patrick.

I am running it with the quiet insert, although is sounds deeper without it. Any difference in power with and without the insert?
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Old 10-11-2008, 12:55 PM   #13
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Quote:
Originally Posted by magzx12r View Post
I decided to go with the M4 GP slip on. Picked it up from Motorcycles Unlimited yesterday. Thanks Patrick.

I am running it with the quiet insert, although is sounds deeper without it. Any difference in power with and without the insert?
A few pulls on the dyno will tell the tale. Each bike it different.
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