There's nothing wrong with bellmouths. Divorced claims the theoretical high ground but it's smoke and mirrors. Also, most divorced designs are crap in reality, way worse than a standard bellmouth anyway. In theory if you had a big turbo you would benefit from divorced. In practice, big turbos use external wastegates and dump tubes so they are inherently divorced. So to review a bellmouth should be cheaper, harder for the company to screw up, and more than sufficient for any possible application it will be used in.
04 STi 16G powered lagless fun
04 WRX: SOLD