Check around with different vendors. The one I purchased from JC Whitney some years back had cutouts at the speakers. You could remove the speaker and the cover install the coverlay and put the speaker and cover back. This helped to hold the ends down. If the car has a dash sensor, a cutout for it is normally provided. In any case, the dry fit is critical to a good result.

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N. Hodges
1994 S350
1987 300 SDL (for sale)