LX Heads vs GT Heads?

Aftrbrnr said:
GT = appearance package. You got a few more goodies and features that the LX cars didn't have (seats and more). I've heard that the GT ground effects are actually functional and helps keep the car planted down at high speeds, if anyone can verify that for me.
My GT is not stable at high speeds, but it could be the 16 year old suspension parts :D