Does 650/750 4-1 exhaust fit to 550?

My original exhaust is in horrible condition, rusted and some PO has already welded front pipes to collector (and not very good :roll: ) and there is holes and pop rivet patches at silencers.
Left side silencer is broken at collector end and only side mount holds it in it's place. Right side is stuck rusted to collector, have to cut it if i'm gonna get it off and there is lots of detached stuff in it...

So I think I'm gonna get new system.
Found this but it says 650 or 750 :?
Then there is this says it fits 550 but looks same to me and it's bit more expensive...

Does any of you have experience of Micron Alfa pipes?
And will I have to rejet if I keep intake stock?

 

I'll train to post pictures here, this is crappy phone photo from a crappy pipes...

 

I put a 650 Vance & Hines on my 750 it mostly fit the muffler mounting point was different had to make a small adapter. When I got my maxim it had one factory muffler tack welded on and a 550 Kawasaki muffler pounded into the other side. Ohh, well fixed now looks and sounds good.

 

i think the 650/750"s are a bigger diameter tube,you can order them aftermarket for like 45 bucks each. I went with a top slash to look like stock.

 

Ok, that could be problem...