Hi, My trunk floor carpet was badly soiled when i got the car, so I bought a piece of matching car carpet 1 metre x 2 metres. Using the original as a template I cut out 2 pieces and covered the original, sandwiching it between the new. Then stitching round the edge with an industrial sewing machine. It now looks as new and the extra thickness helps noise reduction. The trim on the sides has been left undisturbed for now but can be lifted with care just at the bottom edge if you want to slide some soundproofing in there. I have placed chunks of soft foam rubber through the rear light access panels to pack out the big empty spaces inside the rear wings. Results are good, all I hear now is the exhaust note - much better eh! Hope this helps !