I just aquired a 2002 protege 5. this car is great!. It is pretty quick and loves to rev. Just like my old 1984 RX-7 GSL. I am looking to upgrade the exhaust and suspension. I already modified the air intake by cutting out most of the filter box and opening up holes in the grill to get better airflow. I put a K&N filter in and the car already feels like it revs a little bit quicker and around 3k RPM the car has a nice growl to it. I am currently looking at the Mazda speed cat back exhaust or the HKS one. I am on a budget so HKS is a little bit cheaper. I don't want the car to sound like a go-kart with rasberries like my old VW GTI's used to sound like. I am also looking to swap out the sway bars for some better performance in the handling dept too. I was driving home from work tonight and a new Civic Si took a chance wih me and I lit him up. He couldn't hang with my mazda. I toped out at 130 MPH at 5200 RPM in 5th gear.....NOT BAD!.....But need more speed please any suggestions are welcome!!. I am probably going to start autocrossing the car when I am done....