Looking for a nice Dual MUFLLER (not dual tip) cat-back exhaust. I cant find one over net for 1998 nissan maxima. Hopeing you guys can bring me more luck.

 

Because they don't exist. If you saw one then it was probably that one member that actually made it. That is if you are referring to a 4th gen.

http://forums.maxima.org/search.php?searchid=931292

 

most of the people with dual exhausts have cut out the spare tire well to give more room

At Maxus there was a two-tone 5th gen with dual exhausts (similar to the 4th gen, originally a single exhaust) and kept his spare tire well intact but it was custom done at a shop.

Looking under my 4th gen, there's a bit of room behind the right rear quarter panel, if all of the EVAP stuff is removed or relocated. A small muffler might fit, but I don't know if there would be room to route the pipe past the gas tank to the car centerline.

 

if you happen to change your mind and are looking for a single tip full catback system, made by OBX, PM me!