In th rear I have 5 1/4 polks coaxial. The front are Mb quartz component speakers. The quartz are 5 1/4 woofer in the kick panel. The tweeter is fit inside the stock tweeter housing. I took a dremmel tool and removed the stock tweeter from the housing. The tweeter is fused with the housing so it's pretty difficult to remove but once you get it down it looks completely stock.