there are many different ways to install with regards to coverage. The first and easiest would be to hit the problem areas with minimal coverage, mainly doors and the speaker mounting surface. From there you can add to your liking or budget. I think most will agree that sealing up the doors completely will increase midbass response. Floor and firewall application will help to reduce road noise. I also use expanding foam to fill the void in the areas where deadening material cannot be applied. Good luck.