Titanium Hardware Engine Bay Kit - Toyota GR Corolla (2023+)Location Diagram Our engine bay kit includes 22 titanium bolts, 5 titanium nuts, and 6 titanium washers. The kit replaces the hardware circled in the diagram above. The GR Corolla engine bay kit comes with clear instructions that walk you through where to place each hardware piece, ensuring a fast and effortless setup. Locations include: Headlights Core Support Radiator Fluid Reservoir Windshield Cowl Fuse Box ECU Bracket AC Line Bracket Windshield