Installation Kit for Garrett GT40 turbine housing Hardened inch screws original from Garrett Fits GT40 and GTX40 exhaust cases The mounting set consists of 4 inch screws in the correct material and the correct length for mounting GT40 exhaust cases on a Garrett GT40 or GTX40. As a replacement if an exhaust case has been replaced, or as a mandatory part if a GTX40 and an exhaust case is ordered. Price per set (4 screws)