ok i have a rb20det in my 240sx... im new to the import world and am very confused.... one of my stock injectors crapped the bed today and i was on ebay and i was going to get a set of aftermarket 440cc injectors for the rb20det motor i think there venoms.... now with these it says its a direct fit... now will this bolt in with no other modifications.... now keep in mind im a rook here so please explain what you say