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Akra 09-12 silencer differences?

Joined Jun 2011
351 Posts | 24+
Finland
Can anyone point out why there at least 2 different slip-on's available for our bikes from Akra, and what are the main differences?

I have the SXS10450512 model with oval shape, fixed hangers and ti end cap on my bike:

-http://www.ktm-parts.com/SXS10450512.html#.USs26KLFHZI

-http://az79640.vo.msecnd.net/akrapovicbppmultimedia/a4087a8070f94157b9cfcb3507cce027.pdf

Then there is this one with hexa shape, carbon hangers and carbon end cap:

http://www.ktm-parts.com/81205079000.html#.USs7WqLFHZI


Finally the new -13 450 SX-F has similiar model 78905979000 with oval shape, ti construction and fixed hangers:

-http://www.ktm-parts.com/78905979000.html#.USs7-KLFHZJ

-http://az79640.vo.msecnd.net/akrapovicbppmultimedia/7c917643e61641e4a3000afa772bec69_Generated.pdf


Do I have some sort of entry level pipe or are they all the same performance wise? Looking at the schematics the noise killer insert is a lot different and looks more restrictive on my model. Length wise the silencer I have is longer.

The reason why I ask this is that I'm building my motor quite heavily, and I don't want any bottlenecks on the bike when I finally hit on the dyno. My friend had the hexagonal carbon can, but sold the damn bike with it a while ago...
 
I know it's an old topic but this is important. Does anybody knows if there is a difference in fitment, performance etc between the slip-ons maKe mentioned above?

I'm thinking in getting one of the newest models (the 2013 450 sx-f version) but I wonder if there is a carbon endcap accessory for it and if the mounting holes match perfectly with a 2011 FS 570

Thanks!
 

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