yeah they were kinda tight fit mine didnt fit so i jsut kinda made it work the best i could, also mine had 3 nipples one side and one on teh other, shouldnt it have been 2and2. also my o2 sensor didnt protrude into the airflow so i stuck it in a piece of tubing and then stuck teh other end of the tubing over one of the nipples. kinda real rigged. also what does that piece of flat metal go to. i never used mine.