i have a 98 gtp, i was racing my buddies vr6 jetta, an i blew my heater core line, an my temp gauge pegged to the max, i got shut the car done rite away, drained the whole cooling system replaced the heater core line, the service engine light is on tho. an the car dosnt have near the power anymore, its dosnt knock or anything tho..... any help?? an what is the best cheap exhaust for a gtp??