As long as they're single inlet mufflers, then it'll fit. You will need to get custom piping done as well unless these are cat-back exhaust systems ready to "bolt on".
I like the second one shown there with the dual outlet pipes. It looks very nice.
'94 Supercharged E36 325is (150,000 original km's)
-Vortech V9 G-Trim @ ~10psi w/ BOV
-255LPH Walbro fuel pump
-TEIN SS Coilovers w/ Pillowball mounts
-Keskin KT1 17x8.5 & 17x10
-Remus full catback
-Authentic Rieger Infinity I body kit
-SMT6 EMS (Untuned)