CAT question

Hey guys,

quick question, does the brand of the catback really matter? I'm getting a universal one fitted into my car atm cuz its convenient as mine is cracked and the noise is getting to me. Lazy to shop around so just let the closest exhaust place to my work fit it for me. Charging me $295.

ask egSi

$295 seems abit expensive is it a larger highflow one or just standard?
I've found that some brands flow better but in the end they are designed to reduce pollution