OS105 protune or MRCI

[Chris Boughton]

Hi guys I've recently got a brand new OS105 HZ for my 700n, has anyone flow either of these exhausts and which do you all recommend out of the 2? Am I also right in thinking the MRCI is only for pumped engines ? And lastly where is eveyone buying them from ?

20191017_214548.jpgThanks chris