yea just muff it speical order ,u know all 5zigen exhausts product almost is catback http://www.5zigen.com.au/gn%2B%20muffler.htm oh fire ball zero ,tip look small for corolla? :P my freind there have a catabck and cf bonnet sitting in shop yeah. you need to modify the boot where the spare tyre goes to accomodate the exhaust.