|I use the Apexi filters...
that are similar dimensions. They have an incorporated venturi as well, but I am unsure if the dimensions are perfect like the JWT pop charger stacks are.
I do like the smaller filter though because with urethane elbows, I can get them close to each other, and tucked up mostly behind the bumper. Another thing I like is they are freaking loud! The intake noise in 1st and second up to about 6k rpm is louder than the exhaust!