Diamond Audio 5.25" Coax I installed my Diamond Audio m351i 5.25"s in the front over the weekend. I took out my factory 6.5" and was able to modify the stock speaker mount to hold them. The intreresting thing is I was able to use the stock component tweeter also. The sound quality is 10x that of factory sound. Now I can actually hear my radio with the windows down. I plan to add the rear soon, maybe move the 5.25" to the back and then put 6.5"s back into the front. I recommend these speakers and you can find them on ebay for a great price, especially used. They retail for $100-$120 but you can find them for a lot less.