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The Rotated Turbo Tuner kit is designed around the customer who already may have a turbo, and or a wastegate,and is looking to install them onto their WRx or STI. As long as you have one of our supported turbos and wastegates, you can get the same level of performance offered in our complete Rotated Turbo kits. Every kit includes all necessary items (except turbo and wastegate) to install on your WRx/STI (with Front Mounted Intercooler.) With many years of production under out belts, you will feel confident that this kit will last and perform. PERRIN Turbo kits are not for the faint of heart and it is best to speak to a PERRIN specialist before ordering. Let us help choose the exact combination of turbo and exhaust housings to meet your needs. We can help you choose the extras that make this project successful from things like ECU tuning tips, recommended engine internals, injector size, fuel pumps, etc. PERRIN Rotated Turbo Tuner Kits are designed for customers that are looking for 400+HP but may already have a turbo or wastegate. This option allows customers an inexpensive way to get into our turbo kit or allows them to build their car part by part. Like our complete kits, these tuner kits are designed around Garrett GT30R, GTx30R, GT35R, and GTx35R turbochargers, which can support 600+ Wheel HP! Each kit includes an Intake system, 3" downpipe, a boost tube connection for Front Mounted Intercooler, and all other parts needed for installation for those who already have a Front Mounted Intercooler. The stock location for the turbo is limited by its narrow pathway for the intake which travels under the intake manifold. This narrow path is nowhere large enough for 3"-4" intake systems to function. By rotating the turbo off to the side, allows for a larger intake, makes a smoother transition from the Up-pipe to the downpipe, creates space for a large external wastegate, and of course, almost any size turbo we want. The PERRIN turbo kit places the turbo in the optimum position to attach to almost every aftermarket front mount intercooler as well as clear all OEM parts ensuring no damage from the extreme temps. The PERRIN Rotated Tuner Kits are able to produce as much HP as the turbo you choose allows. If you are buying this kit and choosing your own turbo, keep in mind the kit is designed to work with turbos ranging up to 750 engine HP. If you interested in buying a turbo from us, give us a ring and we can help you decide which one fits your needs best!