you can check really easy.....
if you have 2 lines coming into your fuel rail you have a return system...if it is just one... you have a returnless sytem


1998 Black SVT (#469 on 4-24-1997) Custom Cougars CAI Custom Magnaflow exhaust opt. jet-hot-coated Y-pipe B&M short shifter Stazi Rotor & Brake kit 17x7 Enkei RO56's Mirco Splitter 15.45 @ 89.03 (Stock /w worn clutch) 172HP 164TRQ (stock)