ok i figure out that i need a -4an fitting for the feed and i need a hose with -4an ends on it for my turbo project.... i believe the feed gallery on the back of the ecotec block is a -3an fitting size......MY QUESTION is do i need a fitting the is -4an on the hose side and -3an on the block side for it to work?...heres the piece im talking about:http://www.atpturbo.com/Merchant2/me..._Code=ATP-OIL2