13 CRF450 FMF systems

Ive been looking into the single sided FMF exhaust systems for my honda. What id like to know is the following:

 

Is the 4.1 factory silencer worth the extra money over the powercore 4 muffler? Will i get any extra ponies out of the more expensive system or is it just for show?

Great question. I'd like to see a comparison of flows for thesingle sided slip-ons: RCT vs the std-packed version.

Edited by Eddie8v

power will be identical, the factory is a bit lighter. And the powercore you can use a spark arrestor.  If you want a no compromise race system 4.1 or rct.  the powercore 4 works just as well.

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