Grimmspeed Turbo Heat Shield for Subaru WRX, STI and Legacy is designed these to work with even some of the largest turbos on the market as well as people running an external wastegate. We knew when it came time to design this product we didn't want to just create another heat shield to add to the mix, but create another level of product. The basic heat shield would not cut it, we wanted every fitment of turbo, downpipe, and up pipe combination we could work into one design. We measured, cut, bent, welded, riveted, and after many tested prototypes we arrived at a heatshield we are extremely proud of. Other heatshields had problems with cracking, poor fitment, or poor heat coverage but we would not settle for this! So here it is, elegantly simple in style, but painstakingly engineered in design. It's what you can expect from GrimmSpeed.