My ex had a air to water on her Vortech equiped '00 Si. Got the job done for sure, but with some of the nice FMIC kits out for DSMs these days, I cant justify it. I think they should be used in cars where a FMIC would just be too ugly to plumb in. But you can go either way. All of the fast DSMs (7-8 seconds) are running regular FMICs for reference. Its up to you.