This is a custom designed mounting bracket for use when replacing the factory tweeter in an Infiniti G35 (w/Bose). The attached SKPs can be altered to fit whatever tweeter you have. In this case, I am using Sound Ordnance 1" tweeters (http://www.crutchfield.com/p_777P65C/Sound-Ordnance-P-65C.html?tp=106).1] Alter the SKPs to fit your tweeter. 2] Print one of the top and bottom for both sides of the car. 3] Snap the tweeter in the bottom piece. 4] Align and attach the top piece to the bottom piece, holding the tweeter in place. 5] Install in the sail panel.