This easy-to-install adapter converts your factory oil fill tube to a -12AN male so you can plumb a catch can on your force inducted set ups. Simply remove the factory oil fill cap and thread this adapter in.
Will fit a large variety of GM applications(LT1 LT4 LS1 LS6, 4.3, 4.8, 5.3 ect.) with 1/4 turn oil fill caps.
Also fits Gen 1(2011-14) and Gen 2(2014-17) Ford Coyote 5.0 Engines with 1/4" turn oil fill caps.