TiAL 38mm External Wastegate. F38 Perfect for mild Turbo Charged Engines. The perfect wastegate needed for the basic turbo kit. Its low cost is great for such a quailty unit. The flanges do not come with this wastegate. Pick the SS Valve if your going to run C16 etc or other leaded fuel Remember by picking a spring pressure you will run really close to that psi. You cant go under that pressure only above it. So a .5bar spring in a 38mm will run about 7psi, you can then install a boost controller to up the boost to 10psi. You will not be able to go under 7psi unless you change the spring. Colors not stocked. Usually pick the spring close to the boost you want to run. ***COLORS NOT FREE ON THE 38MM***