Dont toss out an open ended question without explaining what you are looking for! Many different exhausts will fit the B14, But we have no idea what your goals are (SHOW?RACE?STREET?) a break down of exhaust would give you.
Ehaust from the axle back with stock piping,
No more than 2" pipeing with no cat, (if you can getaway with it) or a high flow with a resinator and and oval exhaust.
2" pipeing from the cat back any freeflow exhaust will work.
2.5-3" from the header to a flex sleave, to a free flow or no cat (DEPENDING ON HOW STRICKT THE COPS ARE) With any (PREF Magnaflow) exhaust....
I have waisted money trying to figure out what would work best and you can make any setup work depending on how quite you want the car to be and the Future of the car. So many options, DET, Turbo, NOS, All motor?