I am in the process of getting together my next stage of mods and need some info to save me spending cash needlessly...
I have already got sti injectors and an sti topmount intercooler ready to be fitted (both newage).
I am in the process of getting headers, a decatted up pipe and bigger turbo (TD05 18G) as and when finances allow. What I need to know is do all these have to be matched to each other or can I use an sti uppipe, andy forrest turbo and scoobyclinic headers (for example)? I realise there are engine management issues using a decatted up pipe on a WRX (as the ECU monitors the function of the cat).
Any suggestions?