If you have a look/sqwint you can see the hole in this pic on the 90° bend also not sure you need the dampener as fluid hammer shouldn't happen as it will continue the path down the straight return hose at the end? All I can say is mine works great and fuel pressure is stable, but you might as well contact them to set you nerves at ease. Vortech is NOT Aam, two different companies, two different products. Better to ask questions now before it goes on the car though.