Does anyone know the most cost effective modification to get the most horsepower from a 94 GXE?

CAI?
Exhaust?
Etc?

 

Wussup I have a 3rd generation Maxima and I got a Rhino Performance Muffler and it's great and inexpensive compared to some other mufflers available for my car and as far as intakes go my suggestion is to go to cattman.com cuz the selection is so small for maximas

 

The most cost effective mod is definitely NOS. But if you want to start of on the basics get an exhaust and make yourself a custom cold air intake or ram-air. $250 is not worth any intake to me esspecially when you can make one that gets twice the results

92GXE, touring wing, 18” racing wheels, Port&Polished intake, custom intake, custom yellow interior, racing seats, back seats taken out and replaced with subs and amps, NOS kit, Suspension tech. Lowering springs, custom grille, soon to be custom painted and have the whole engine rebuilt for big shot NOS and custom SC and tranny converted to 5-speed.