The core sizes are not very big so not much gain for the trouble of doing the install which will probably require cutting some of the shrouding above or below it or both and adding more on the ends to direct air flow, etc.....
I have been looking into this for some time now and found some bigger core size units but not sure how well they are made, flow, etc.....I am considering getting the lower priced one just to see what it looks like inside and then maybe test it but I have no means to do this fully, just have to install and measure temps, not flow. I could do a canned tune and compare what other IC sold for the car show for power, etc...then get a dyno run on it.......
I do want a fairly large IC due to running 20-30 minute track sessions with probably the GT25 or possibly bigger turbo as long as not to much lag for street use(I race on track, not on the street, just needs to drive well on the street) this is why looking a the biggest ones sold by aftermarket ST providers and DIY even bigger.