Hey, so how do I go about if I wanted to upgrade from the mitsubishi turbo that volvo put in my 04 s40 right now. Would I have to find a turbo that fits in my s40 or what? I dont mean to be stupid, but I'm not sure how it works when upgrading turbos, what do I have to look out for, etc. I'm not defintely doing it but I just want to know how it would work if I did decide? Thanks.

right now it has the TD04L-12T-8.5 twin scroll made from MHI. Let me know if you know what those numbers stand for. Thanks again.