You were quote $1900 because that was a supply and install. The $550 one is actually $650 and it comes from Ebay. You install it yourself, and with very little mechanical knowledge, you can do it easy as. Only reason he said $550, is because if he sold his up-pipe which he doesnt need (like myself which id also sell if anyone needed it) it'd give him $100 back in his pocket. Hence $550.