2 1/2 inches is too big for the exhaust dude should be 2- 2 1/4, might be lucky to find a cold air intake in australia i have never seen one for the DA could always import though. so much stuff to do well where do i start? i would suggest more suspension mods first, swaybars etc. get some nice wheels and good rubber, upgrade the brakes then start looking at power. www.g2ic.com is a great resource, mostly american but you get the idea.