I can't speak for the cat-back but the Flowmaster 50 series seems to be a great match with the 3.2. It's not overly loud at highway speeds, but it can be loud enough when you want it to be on hard acceleration. Idle sounds good. Matt carries it at Indy 4X

Pete

'01 Rodeo Sport, 5 Speed Softie, Indy 4X rocker bars, OME 912's, Rancho 9000X's, Superwinch hubs, custom tube bumper with Warn 9000i , Flowmaster 50, TeraLow t-case gears, ARB front & rear lockers, TrXus MT's, Sway bar disconnects