The OEM body panels are injection molded plastic. When the Mazdaspeed and M2 1015 came out with their own special hoods and wings those were made of fiberglass. Of course being the cool car this is, aftermarket companies made their own body kits. The panels are all simply bolted on to the frame and it makes for an easy job to swap out whatever you like if you can buy or make it!
I tried to collect as many as these as possible but due to the simplistic nature of these panels; there are likely so many one offs out there I can’t collect them all. If I missed anything please email me and let me know if you have something to add! Thanks!