NOS Nitrous Filter In-Line -6 AN to 1/4" NPT Big Shot Aluminum Blue Anodized EA, NOS/NITROUS/NX/ZEX/FORD/CHEVY/MOPAR/CHEATER/BIG SHOT/ 4AN X 1/8" FILTER FITTING , NOS/NITROUS/NX/ZEX/FORD/CHEVY/BIG SHOT/PRO SHOT/RACE/ 6AN X 1/4" FILTER FITTING!, NOS/NITROUS/NX/ZEX/FORD/CHEVY/BIG SHOT/PRO SHOT/RACE/ 4AN X 1/4" FILTER FITTING!,