Does anyone have oem panniers and/or oem top box and non-stock exhaust system? All info I've found is that only Akra with heat shields and stock exhaust is safe for oem panniers

?!
We have in Poland a company doing professional modification of stock exhausts (decat, increased diameter of pipes, different material used for isolation etc) what gives better sound but not give any weight savings or better look. I send my exhaust to be modified by them, but still looking for other options if any.. Here is MT-03 before and after, and according to what they told me, MT-03 and xt660z share the same exhaust system, the only difference is shape of the black shields..
http://youtu.be/_KnTpIAGXg8
P.S.
I know that I can use alu panniers, but I've received from Yamaha dealer set of oem as part of discount, and I like slim look of the bike with them.