12v Electronics is now offering custom made speaker mounts for E39 BMW's. These baffles will allow you to install speakers up to 6.75" into your vehicle without any cutting or drilling into the car. They use the stock speaker bracket mounting holes and can be custom made for the speaker of your choice.  This makes installing aftermarket speakers into your car very simple. We can make the mounting hole any size to match your favorite speaker. There are some restrictions on size and depth, but most speakers up to 6.75" will fit in these mounts. They use the factory mounting holes so no cutting or drilling is required.  We are offering them for sale custom made to your speakers dimensions. We will ship custom made items in 1-5 days. Please choose the cutout diameter in the dropdown box when ordering. Cutout diameters larger than 5 3/4" are not recommended. The speaker mounting hole size will be listed in the specifications of your speaker. If you have a size that is not listed or are purchasing these with a set of our Hybrid Audio Technologies speakers, please check the box labeled OTHER and enter it in the comments box at checkout. You can also contact us for more information. These mounts were designed for use with the Hybrid Audio Technologies Unity and Mirus 6.5" speaker sets. They work wonderfully with these speakers and are offered at a discount when purchased together.   As of 8/2015 we have discontinued the MDF versions of these mounts. We now only offer them in Baltic Birch Plywood which resists moisture much better and will not deteriorate over time like MDF will.   Note: Most 6.5" speakers use a 5 inch to 5.75" mounting hole. This is the specification we will need.   Includes: One Pair of mounts and fasteners.