I picked up an FMF SST pipe, and it has no spring loop on the flange, no o-ring, and no silencer to stinger clamp or coupling. Should it have any of the above? I have always seen silicon or rubber couplers between stinger and silencer. Does the SST just slip on and go? Also, do I need an o-ring for the pipe to flange connection? Will a Banshee o-ring/spring kit work?