Yeah were shooting for 330-350hp on pump gas with a 2.0 liter, you cant get anywhere close to that with a 20g.

It also spools as fast of faster than a 20g, it does not have a suby style flange, that is the problem with the bolt on gt30s for subarus to get them to fit in the available space you have to make too many compromises.

Dan builds a custom adapter so that you can use your upipe, with an STI theres really no reason to make a whole new upipe.