As with any top mount kit, clearances are tight. Clearance and fitment is verified for turbos that we sell a kit for. For any turbo not on our list; fitment is not verified. Also note that the bigger compressor housings of the BorgWarner S3XX series turbos have reduced clearance to the hood (around 3mm). With variability of motor mount isolator thickness, age, and other tolerances, fitment can be tight.