I'm looking into buying a High Flow Cat for my 95 Supra along with an Apexi GT Spec Exhaust. My problem is, on different pages people say that there are different exhausts or different Catalytic Converters for Turbo, Twin Turbo, and Non-Turbos. A lot of the pages conflict with eachothers opinions on what parts are for what engines too. Can anyone take the time to explain this to me better, or perhaps just answer this, 'If I buy these parts for my Supra now, and then I upgrade to turbo within the year, will I have to spend money on a whole new exhaust system?' Thanx guys, hope you can help me out.