So while the S is down for the winter, i want to tackle a project that i wanted to do for a while, an under boddy diffuser, im purchasing an apr front splitter and a spoon rear diffuser and down force side diffuser's, as of right now the only optionf or an under boddy diffuser is by PSSWRD JDM and its like 3k for it, so im looking to get either alunimum or carbon panels and custome making an under body diffuser, my question is has abyone ever done this and if so, any tips or pointers or even a DIY on it?

 

AlloyCraft and GPFab (hopefully anyways as I hve his rear diffuser) are both in development stages for their full underbody diffuser.
Both are sponsors, and both have theads in this section about them.

I know you could take some pointers from AlloyCrafts thread, as they have pictures of their prototype.
Or, just buy the one they are making, which I will probably do if GPFab doesn't hurry up and finish his.