Its funny but the pipes if anything did not make the car feel that much quicker. However the results are there when you start running the times, and testing HP.
i think maybe the pipes smooth out the torque curve so much that there is no noticeable boosty region however there is more hp throughout the entire rev range resulting in faster times.
My exhaust system is outlined in a post above. The best place to get them from is from newcastle exhaust services, details will be on celicamads website very soon, near windale. ask for Pete and tell them Matt sent you, be nice and he will look after you.