07-14 GT500 strut tower covers designed to work with tall adjustable struts. The performance pack covers already work with the factory bilstein adjustable struts. Those have 1.25in of clearance. If you need more clearance this is the covers you need. 
Installation: friction fit. Slide the barrel on the bottom of the covers into the hole on the strut towers 
Lead time: 4-6 weeks 
Please contact me if you have any issues whatsoever. Thanks!