Hey guys, Long time lurker first time posting. Just looking for some information, Ive recently gone through my stock samurai wiring harness and removed excess wires and ECM. Im just buttoning everything up now and left with this "filter" Just wondering if anyone knows what the exact purpose of the "filter" is as seen in the wiring diagram and if its required. Thanks in advanced!

Its to stop big noise spikes getting to the rev counter.