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Slip-on Exhaust for 2011 CRF450R

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I'm wanting to get a slip on exhaust for my bike soon. I ride mostly Hare Scrambles with the occasional track day. 

I've been looking mainly at Yoshimura RS4and Pro Circuit T-5. How does the power of a slip on compare to full exhaust? I would like something that broadens the power more while being smooth and tractable.

Edited by MXandSXracer21

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In stock trim the 09-12 models go flat up top.  The oem exhaust is restricted & the stock map is not very good.   I'd highly recommend buying the RS-4 + a remap to go with the Yosh pipe.  You can request to have a smoother map programmed for hare scrambles instead of mx use.   Tokyo Mods would be a reputable place to do a remap for a reasonable price.  

In my case I picked up a like new Yosh RS-4 Ti/Ti for $250 off CL & a $50 remap for a 10 model that gave it more power with a broader rpm range.  As a vet mx rider the engine has more than enough power & it also livened up the upper rev range.          

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