I just got my Walbro 255 today and was wondering which one you guys are using. I got a GSS 341 which is what they sent me. In doing a search I found that some companies are specifying a GSS341 and GSS315 for 84-92 Supra Turbos. They both pump 255 l/hr but the 341 is high pressure and the 315 is not apparently. I am planning to run the whole air/fuel mod (walbro, lex afm, 550's, safc-II, afpr, etc...) and was wondering if the 341 high pressure was correct for my setup.