I'd say K&N air filter. Not too expensive good for a few ponies though. Oh yeah a friend on mine has a 99 V-6 they are pretty quick cars. They improved them a bunch this year. Just wait till that thing breaks in. That's when they start to move. My buddy's is at the point where he's got enough miles on it that it's broken in and it's much faster than when he first got it.
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89GT,T-5,Stock,no air silencer...more mods coming soon!!!
Best ET 15.388 @ 90.04
180,xxx miles and still running strong!
1989MustangGT