can someone identify this part

[97LaserRed]

Sorry for the Noob question here but i never knew what this is for or does..... kinda embarassing lol but the big silver round thingy

my buddy asked me and I thought it had somthing to do with the fuel regulator but not sure..

is it a check valve???

if not can someone point me in the right direction to where the check valve would be located on a 98 gt. reason im asking is he is putting a procharger on his car and it says to remove the fuel check valve for proper install. is this a must??


this is not his car just a pic i found online