no a sport's cat isnt needed a standerd cat should be fine whith most cat back exhuasts, i just want 1 to free a little more power and also i am not happy whith the exhuast loudness from the miltek cat back i feel for my taste it needs to be abit louder i also like it when you here pops, the note is nice but it sound's a bit stock, you should be ok for a sports cat you have a 2L, im really strugeling to find one at the moment it look's like i need a custom 1 that seem's to be the only answer