These Turbonetics replacement turbine housings are aimed at those who want to rebuild or upgrade their existing turbocharger. The turbine housing has a great effect on your turbo spool time and ultimate power so finding the right one and keeping it healthy is the key to making big power. These compressor housings utilize the best castings and are offered in a variety of designs and A/R options so that you can find the right one for you. As with all Turbonetics products, these turbine housings are built to tight specifications, so fit and finish will not be a problem. Don't replace, rebuild with the help of Turbonetics and their replacement turbine housings.