The HKS vein converter that does away with the MAF meter, by using a so called more accurate air metering device(absolute manifold pressure), the MAF that makes N/As have the T split intake hosing after the filters/filter(if using jwt), sense no one makes a chip for duel pop N/A . im no pro but i would think getting rid of that part of the intake the split(which has to have some turbulance )and just having 2 filters and pipes, two individual filters and piping.... yaa tho the vien pressure converter goes for 800ish and then 2 cone filters another 200ish, and then wuteva custom piping that would be needed. but sorter intakes or less turbulant make for better response