Gidday.Just bolted on a pair of cycle shack slipons to my mechanically stock Rocker c. Awesome. Great sound . Almost too loud if thats possible .Ha. My question is about the instant loss of back pressure. Its runs free and even a bit quicker. My concern is about the stock power module. They are only slipons. No need to unplug censors etc. Does the power module need to be changed ?  Anyones thoughts or opinions most appreciated. Cheers 

Thanks.. Cheers