I cam across a person who owns a scion xb who has a magnaflow catback exhaust. That exhaust sounded deep and rich. The individual pulses were not a noticeable aspect of it and quiet too!!!. Since magnaflow makes alot of exhausts for trucks, this sounded like a 2.5L on a 1.5L. I was wondering if anybody could suggest some aftermarket mufflers/axel-back for 1998 toyota corolla that would not only increase a little hp but sound deep and rich? Not lean and tinny.