I rethought my recommendation and decided my advice is incomplete, if not bad. Anytime you change to a higher rate spring (which you are bound to do no matter what kit or make you choose) you should also select and appropriate shock with dampening for the spring/car. Once you factor in the cost of springs and a decent shock together, the kits from Truechoice start to look alot better. There is no getting around the fact that when you say racetrack, you'll begin to hear cash registers ringing in the background.
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Chris
2000 SVT