Description :

PERRIN Rotated Turbo kits include everything for your properly tuned WRX/STI.  PERRIN kits are designed to bolt to factory exhaust manifolds, and to factory catback exhaust. PERRIN Turbo kits are not for the faint of heart and it is best to speak to a PERRIN specialist before ordering. Let us cater the exact combination to meet your needs. We can help you choose the extras that make this project successful with ECU plug-n-play tuning, fuel pumps, etc. NOTE: Some systems do require engine modifications for optimum longevity. Overall Kit Design The PERRIN Rotated Turbo kits were originally designed for the customer that needed something bigger and more efficient than a stock location turbo replacement.  A stock location turbo has 2 problems areas that cause inefficiencies, and loss in possible overall horsepower, the Intake path, and placement of turbo.  Both limit the size of turbo, and sacrifice intake path restrictions, again limiting potential horsepower. PERRIN™ Rotated is Better! The PERRIN rotated kit is just that, rotated! Because we rotate the turbo to the side of the engine we can use a larger, smoother and straighter intake system. , and pretty much 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. NEW! Cold Air Intake Hose Yes our newly revised turbo kit includes a completly new 3" cold air intake system.  This new inlet hose is designed to supplied fresh cold air to your Garrett GT turbo.  The new intake has fittings for all your crank case, valve cover breatherst and other emissions control hoses.  You will see 2 very important changes to our intake system. No MAF sensor housing The MAF Sensor housing has been moved to our revolutionary new Blow-thu boost tube. The Blow-Thru boost tube places the MAF sensor inline between the intercooler and the throttle body. Now your ECU will receive a temperature correct reading. No BOV recirculation fitting For the first time you can now safely use a Vent to atmosphere blow of valve on your Subaru!  Because we moved the MAF sensor to the Blow-thru boost tube just before the throttle body now vent extra boost pressure without the risk of running lean due to a loss of metered air. Any air vented from the blow off valve is now before the MAF sensor allowing the ECU to always receive a accurate reading or air entering the engine. PERRIN intake systems always include a high flow foam filter element, perfect for large turbo applications. Also included are silicone adapters, and vacuum hoses for the installation. The new 3" pipe aluminum piping look good and out performs previous intake designs. PERRIN Up-pipe The PERRIN Rotated Kit up-pipe is a TIG welded, CNC mandrel bent, 2" 304SS tube with .500" CNC cut flanges.  The external waste gate is plumbed into the up-pipe with a smooth transition from the wastegate to the exhuast system allowing for smoother exhaust flow and greater control of boost levels. The up-pipe is  designed to bolt to a factory exhaust manifold for those who choose to use the stock manifold. We do recommend that you consider the PERRIIN exhaust header. It is a great way to lower the spool RPM, and make more power throughout the RPM band. PERRIN Downpipe The downpipe is TIG welded, CNC mandrel bent, 3" 304SS tube with .500" CNC cut flanges. The PERRIN downpipe features an auxiliary dump tube to recirculate exhaust gasses from the waste gate back into the exhaust system eliminating the risk of fire and melting components from high heat associated with wastegates that just dump under the hood.  The PERRIN downpipe dump tube features a floating flange design which can move and adjust to the extreme exhaust temperatures. The tight slip fit allows for expanding and contracting of the wastegate dump tube while still proving a nice tight seal. This slip fit also allows for easy quick removal of the wastegate with out having to unfasten V-band clamps, or flange connections. At its base the downpipe features a exhaust flange designed to bolt up to your OEM catback exhaust. In turn most aftermarket catback exhausts and the original stock exhaust system will bolt right up to our turbo kit. Of course any of the PERRIN Catback exhaust systems will bolt up too. PERRIN/TiAl 44mm Wastegate This Wastegate is a key part to controlling boost. We choose the Tial™ 44mm with V-band connections. V-band connections allow for a tighter more compact install of the turbo kit. Tial™ is a premier brand specializing in wastgate design. Their high quality NiCrFe based alloy valves and 347SS valve housings will offer longer product life compared to competing designs.  A 17-7 PH Stainless Steel actuator spring gives consistent pressure at high temperature, resisting  "relaxing" at temperature to 900F (483C).  The 44mm model features a larger diameter valve compared to other kits, which makes for flawless boost control. A 14psi WG spring is included with the kit but many other spring choices exist! Exhaust Housing Size Selection TIPS Most PERRIN turbo kits come with two exhaust housing options. .63AR, and the .82AR. The AR in simple terms is the overall size of the housing.  A larger number indicates a freer flowing housing. A larger housings flow more air, but at a lower velocity which in turn has less energy spool the turbo. Though more airflow does equal more upper end horsepower, a larger AR will increase boost lag. The smaller AR. will spool the turbo faster it will have lower horsepower on the upper end. This Chart will Help You Decide Which Turbo Fits Your Needs Best   Turbo: Max. Airflow: Spool RPM 2.0: Spool RPM 2.5: Application GT3071R 46lb/min 4200 RPM 3500 RPM 400whp GT3076R 52lb/min 4800 RPM 4000 RPM 450whp GT3582R 60lb/min 5500 RPM 4700 RPM 550whp 2.5L Only GT4088R 69lb/min 6000 RPM 5200 RPM 600whp+ 2.5L Only HARDWARE: In addition, the Perrin rotated mount kit includes all the necessary hardware, bolts, lines, and gaskets for proper installation. 02-05 EJ20 2.0L WRX owners will need to purchase an oil feed line, but all other models will find all the necessary turbocharger hardware for kit assembly in the package. FITMENT and IMPORTANT NOTES: 1. The Perrin turbo kit either requires a Perrin front-mount intercooler with blow-through MAF tube, or some form of engine management that eliminates the MAF sensor. This kit makes no provisions for the stock MAF sensor. 2. Engine managment, fuel system upgrades, and supporting modifcations are required with this kit. 3. Professional installation is strongly recommended; this is not a task for beginners. We strongly suggest a shop familiar with Subaru performance. 4. Tuning will be required with these kits. 5. We strongly recommend considering engine internal upgrades for those looking to exceed 400whp on 2.5L cars (300whp on 2.0 WRXs). 6. As with all turbo kits, there is some "tweaking" / "elbow grease" required for installation - i.e. trimming, unbolting, minor grinding, etc. in varying degrees as each car is a little bit different. For this reason, we suggest professional installation by a Subaru performance shop. 7. 2005 STi models and all 5-speed models require some grinding of the transmission housing for clearance and a soft bend in the dip-stick sleeve for clearance. 8. This kit is designed for the Perrin front-mount intercooler and blow-through MAF tube. 9. Anything over a .63 GT3071R on a 2.0L will have lots of lag; the EJ20 will require internal modifications for proper use of any of the bigger turbos. 10. We recommend internal engine modifications for the GT3582R and above on the STi to maximize potential. FITMENT: 2002-07 WRX & 2004-07 STi   Oil Feed Line: Adapts any 02-07 WRX & 2007 STi Oil Line (Required) Please Select: TURBO KIT GT3076R .63AR RED INTAKE - PSP-ENG-868RD TURBO KIT GT3076R .82AR RED INTAKE - PSP-ENG-869RD