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Discussion Starter · #1 ·
Looking to see if anyone has cracked one of these open yet. I would like to see how much junk is inside it and was considering chopping it open myself but not sure when I will get enough time to do it...

Has anyone just cut off the stock muffler completely and ran it open just after the O2?
 

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Just out of curiosity why would one want to do this? I think replacing the exhaust is a much more viable option, plus if you need to stock out for warranty you can. The m4 slip on probably what you are looking for.
 

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Discussion Starter · #5 ·
I was just curious. I would like to see how they designed the inside and the way the exhaust flows through the can and how many times its redirected. I will look at the link and thank you!
 

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Last night I chopped off the box to do an M 4 slip on.

They say to cut just beyond the weld and smooth out to slip pipe over.

Just my luck to get the one with a cold weld 1/8th inch of bead on top of the metal.

Was a lot to grind off.

The headers aren't too heavy, but the box feels like a solid brick for weight.

M 4 plus stock head pipes weighed 9 1/4 Lbs.
 
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I was just curious. I would like to see how they designed the inside and the way the exhaust flows through the can and how many times its redirected. I will look at the link and thank you!
I can't answer about the FZ-09 "toaster box"....but I have dissected others and it's always THREE reverse direction...or "baffles" inside the can.
 

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Last night I chopped off the box to do an M 4 slip on.

They say to cut just beyond the weld and smooth out to slip pipe over.

Just my luck to get the one with a cold weld 1/8th inch of bead on top of the metal.

Was a lot to grind off.

The headers aren't too heavy, but the box feels like a solid brick for weight.

M 4 plus stock head pipes weighed 9 1/4 Lbs.
I am seriously starting to look down this route also, in regards to the M4. Easy enough to return to stock exhaust setup with a single weld if needed.

Would love to see a pic from the back straight on if you have one, how far it sticks out to the side. I like compact.

How do you like it (sound and look), and are you doing any further tuning with the M4 or is it not really required?
 

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I am seriously starting to look down this route also, in regards to the M4. Easy enough to return to stock exhaust setup with a single weld if needed.

Would love to see a pic from the back straight on if you have one, how far it sticks out to the side. I like compact.

How do you like it (sound and look), and are you doing any further tuning with the M4 or is it not really required?
I still have to get my ass off the couch and do the install, now.

Just got some 2006 Yamaha R 1 calipers to install, also.

Be back, later
 

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Sounds like a job for a stethoscope. I happen to have one that can take color pics and video. However, I don't have my stock exhaust at the moment. :(
 

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Discussion Starter · #11 ·
If I could get my hands on a stock muffler, I can find someone with a plasma cutter to crack one open. I am scouring ebay hoping to pick one up for pennies on the dollar if u know what I mean...
 
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