did you remove the recirculating hose on your stock one? that makes psh too, he was asking in comparsion on how the txs sounds compared to removed recirc hoseyes its vents to air. as opposed to stock that makes no noise.
the half moon we positioned with the "half moon" on the hose. stock hoses work. its a simple 2 min mod. literally. 3 bolts attached stock hose and thats it.
it does come with springs but being a sample turboxs sent out the bov first and eventually send out stiffer springs if need be. so far so good no CEL nothing
GenCoupes have MAP and not a MAF. The car doesnt run like crap if you remove the recirculating hose. o.- you sound like a newbie at this.compared to stock im 100% positive it holds boost better and made better then stock for sure as far as benefits is the overall construction of it, no need to remove any hoses and have ur car running like crap just for the blow off noise, and availability im not sure they havent released a date or anything so far.