Bought these six months ago and installed in a 2004 Avalanche after my daughter blew the stock ones. Installation wasn't bad. Had to drill a little bigger hole for the tweeters. Also had a make a spacer for the woofers to have them seal tightly against the door panel. Used Velcro to attach the box inside the door frame so I wouldn't have to drill new holes. Was able to use existing covers so you would never know they weren't original equipment. Sounds great. Clearer at louder volumes than the stock speakers and my daughter hasn't blown these!