To unleash the increased power of the turbocharged motor, you need to allow the turbo to breath more freely, on the intake and exhaust side. You should start at the ends of the system and work inward. Before you start to purchase any performance upgrades though you may want to do some of the free mods on your vehicle if it hasn't been done already. www.diamondstarspecialities.com/dss-ft&t.htm
Although the previous two replies are very true, the best thing to do first is make sure the car is in good working order. Do a tune up, plugs, wires, air filter, fuel filter. It also wouldnt hurt to do a compression test, or have one done. Check all the vacuum lines for cracks and brittleness, and maybe even replace all of them to be safe. Check all hoses and belts. It would also be a good idea to have the timing belt changed if you dont know the last time it's been done.
Although these might not be fun things to do in terms of working on a car, they will ensure good performance later on. Good Luck.
While doing the tuneup go with NGK BPR7ES plugs. These are one range colder then stock. Also when opeing up the intake, there is this stupid little round restrictor in the aibox. It is round it is called a silencer in real terms. Technically it is a POS that just blocks airflow.
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