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I'm looking to buy a plenum spacer and am wondering if its necessary to go with the ISO THERMAL PLENUM or is it ok to go with just the BASIC PLENUM SPACER. Are the Iso Thermal components, Aramid gasket and CCV necessarry. Its only like a $50 different which doesn't bother me but $50 is $50.
I would say there would be little to know benifit in getting the ISO THERMAL PLENUM. The main benifit is by getting more air evenly distributed not by keeping the air cold.