HGK Racing - E92 Doors [Vacuum Resin Infusion]BMW E92 doors made in *The Vacuum Infusion Process (VIP) is a technique that uses vacuum pressure to drive resin into a laminate. Dry materials are laid into the mold and the vacuum is applied before resin is introduced. Once a complete vacuum is achieved, resin is literally sucked into the laminate via carefully placed tubing. Carbon Kevlar parts can hold up several contacts and hits, without need of replacing them. Carbon gives strength and kevlar