My greddy exhuast on my tc bit the dust because of water too,i had the sp2 which sound awesome (alomsot like a stock 350z) until it completely filled with water and killed all the packing inside.
94 Talon TSI AWD 5spd6 bolt 1g big rod/2g psiton combo,crower 272s, crower valve springs and ti retainers, 3g lifters, mild head porting, turbonetics 60 trim, ported 2g mani, 1g vrsf fmic, fidanza flywheel, act 2600 street disc, ecmlink v3 with gm maf to ecu,arp fastners throughout, agx's with H&R springs,sst rear sway bar,Apexi N1 3" turbo-back exhaust, build still going for now.