Stage 1 Titanium Hardware Engine Bay Kit - Honda Civic Si (2016-2021)Location Diagram Our stage 1 engine bay kit includes 21 titanium bolts, 20 titanium washers, and 16 well nuts. The kit replaces the hardware circled in the diagram above. The Civic Si stage 1 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: Plastic Clips in Radiator Shroud Cover Fender Shroud Covers Fenders Radiator Stay Benefits include: