These will cover the frame rail from right behind the core support all the way back to the firewall. The "L" notch you see pictured is the notch that is cut out where the core support is welded to the frame rail. The rear section is also notched for the support tab at the firewall where the rail is attached there. You will have to measure and cut out a section of the cover for your sway bar mount unless you have a drag car application and are doing away with it completely. I have installed these on my car and like the way they fit.