Fitment question on early Monster exhausts

[TooClose Racing]

There is a full Akro system listed on evil bay for "2003 -2005" Monsters.  Insanely cheap.  Will this system fit my 2001 900ie?  Thanks for responses...luv this site.

[brad black]

2003 - 2005 what?  620 - 800 you could probably make it fit.  1000 and s4 or s4r are different at heads.

[TooClose Racing]

Thanks  - I'll follow up.  Thought that might be the case.