just as a quick question, what are the size of the metal lines that connect to the fuel rails on our tpi motors. this accel kit that i want to get says it works with tpi, but i was wondering because one of the fittings is 3/8 to -6 and the other is 5/16 to -6, are the feed and return metal lines different sizes.
http://store.summitracing.com/partde...5&autoview=sku

 

yes they are different sizes and the fittings you are showing are the right ones.