I have acrylic t-tops, not like most people's glass. They are much lighter than the glass ones. And when i get up to 70 MPH the wind blows through between the t-tops and weather stripping, making a sound like my window was open a crack. They also squiek on bumps, any suggestions?

 

I just had this question answered a couple weeks ago. I don't know what year your car is, but my 92 has the lexan tops also. I got a lot of wind noise above 45mph. THere is an adjustment inside the windshield trim at the top. remove the screw and carefully move the trim out of the way. you'll see the adjustment cam there. loosen the screws and move it down slightly. It stoped my noise completely.

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'92 firebird t-tops
305tbi,670cfm tbi, 2 1/2" Dynomax catback, 9x3 K&N open element

 

Just be sure you don't overtighten the tops, if you do the ttop weatherstripping will become too compressed and over time will start leaking water.