Never before used Nissan R32 Skyline diffuser. Originally purchased to try and place on to my sedan but decided it would be to much work to make fit as it’s designed for the coupe. This is a TSEC Diffuser 7pc manufactured or distributed by ModeloDrive with FRP being the primary exterior surface material. ModeloDrive FRP (fiberglass) parts are made to a higher standard than most mass produced US market fiberglass parts. Holes will not always be pre-drilled so you still will need to dry fit the parts before they can be prepped and finished. Due to the nature of fiberglass there may be cracks or surface imperfections that need filled and/or leveled. This should be fixed in the prep stage of installation at a professional body shop.