Mac Exhaust cross compatibility.

[Krunk_Kracker]

I know MAC isn't widely liked on this forum, but AFAIK, MAC is the only company that makes a 4 into 1 for my bike.

That being said, when I look at the 4 into 1 for my bike, I see that it says it will fit an 1100 as well.

http://www.macperformance.com/store/category.cfm?SID=3&Category_ID=1552

Now, I do not want chrome, nor do I want a megaphone muffler. What I do want is flat black and a shorty canister muffler...which they happen to make for an 1100...

http://www.macperformance.com/store/product1.cfm?SID=3&Product_ID=1642

It doesn't say it will fit a 650.

Does anyone know why a 650 kit will fit an 1100 but not the other way around? If it is simply a mounting issue for the muffler/collector area, I can for sure fix that with a welder. Will all the flanges meet up on the block between a 650 and an 1100??

[Krunk_Kracker]

No one has any input?

[Guest]

No one has any input?

I suggest calling Mac.

[Krunk_Kracker]

I've called them and they can't tell me why one fits and the other doesn't.

[Guest]

I've called them and they can't tell me why one fits and the other doesn't.

Hmmm, I don't know why people on here don't care for Mac. I wonder if this has anything to do with it! <Sarcasm>

Where did you find it for sale, maybe you could call them and possibly get a helpful sales person to visually look for you?

<edit> I looked at your original post again and it looks like you went directly to mac. Have you tried calling a place like denniskirk.com, they sell Mac? <edit>

-Dave

[850GT_Rider]

From what other members have reported, Mac exhausts should rust equally on any bike...

[blowerbike]

1100 and 650 has different bore centers.
they DO NOT INTERCHANGE.

[Mercaholic]

Here's a pic of my MAC system.

I painted the chrome parts to blend with the rest of the bike.

As far as fit goes, it bolted on well. I treated it to hi-temp paint and have no rust problems in the last four years

[DrunkenChekhov]

I'm interested as if MAC was able to give you a black 4-1 with the shorty, as I'd love one on my 650. Any updates?

[BoneDaddy]

I know MAC isn't widely liked on this forum, but AFAIK, MAC is the only company that makes a 4 into 1 for my bike.

That being said, when I look at the 4 into 1 for my bike, I see that it says it will fit an 1100 as well.

http://www.macperformance.com/store/category.cfm?SID=3&Category_ID=1552

Now, I do not want chrome, nor do I want a megaphone muffler. What I do want is flat black and a shorty canister muffler...which they happen to make for an 1100...

http://www.macperformance.com/store/product1.cfm?SID=3&Product_ID=1642

It doesn't say it will fit a 650.

Does anyone know why a 650 kit will fit an 1100 but not the other way around? If it is simply a mounting issue for the muffler/collector area, I can for sure fix that with a welder. Will all the flanges meet up on the block between a 650 and an 1100??

You can buy the exhaust for a 550 and have some spacers milled so the headers don't slop around in the ports. I'm not sure what size spacer you'd need because the Mac setup may have a different OD than the stock pipes but I successfully installed a 4-1 for a 550 on my 650GL with 40mm OD, 37mm ID, 18mm long spacers made from mild steel.
Here's a thread describing affixing the 550 header to the 650 head:

http://www.thegsresources.com/_forum/showthread.php?t=154723&highlight=550+exhaust+650

[will61310]

Here's a pic of my MAC system.

I painted the chrome parts to blend with the rest of the bike.

As far as fit goes, it bolted on well. I treated it to hi-temp paint and have no rust problems in the last four years

How does it sound?