Shop by car: Subaru WRX STI (2004-2006) FREE TurboXS Catalog! (Catalog) US$0.00 Twenty five page full color catalog with all your favorite TurboXS products. WRX/STi Racing Bypass Valve (WS-RBV) US$219.00 Specifically designed for MY 2002 and up Subaru WRX and STi's, the WS-RBV requires no adapter kit to install. It is designed for people who want to run high boost levels, but still vent their BOV back to the air intake to maintain maximum driveability. WRX/STI External Wastegate Uppipe (WS-UP-EG) US$329.00 TurboXS introduces the externally gated uppipe. The features include thick flanges to reduce gasket surface warping and to promote superior sealing. Each Uppipe is TIG welded to accept a V-Band 44mm wastegate flange to allow phenomenal boost control. Note - This will not work with the 4 inch Bellmouth Downpipe WS-DP, You will need to purchase WS-DP-EXT WRX/STI Turbo back exahust system (Ti muffler) (WS-TBE-TI) US$1,179.00 Kit includes; 1x WS-DP (4 inch)1x WS-CP (3 inch)1X WS-MP (3 inch)1X WS-RMA-Ti (3 inch, Ti Tip) WRX/STI Turbo back exahust system (standard muffler) (WS-TBE) US$1,149.00 Kit includes; 1x WS-DP (4 inch)1x WS-CP (3 inch)1X WS-MP (3 inch) 1X WS-RMA (2.5 inch) WRX/STI Catless Turbo back exahust system (standard muffler ) (WS-TBE-RP) US$1,049.00 Kit includes; 1x WS-DP (4 inch) 1x WS-RP (3 inch race pipe) 1X WS-MP (3 inch) 1X WS-RMA (2.5 inch)   DELTA UTEC Engine Management (DELTA-002) US$1,049.00 The DELTA v2.0 is the pinnacle of our UTEC Parallel Engine Management product line with improved functionality and vehicle portability. DELTA v2.0 has all same great features you like Pre-Programmed Maps, Knock Detection, Temperature Corrections, Data Logging, Spare Solenoid Driver, Shift Light Output, and complete Ignition Timing, Fuel, and Boost Control now in a new smaller, easier to install package. Application Model Years: 2004-2006 STI,LGT,FXT,BAJA Subaru WRX/STi Front Mount Intercooler Kit (WS-FMIC) US$1,199.00 When massive flow and cooling is needed, the Turbo XS Front Mount Intercooler delivers. Dwarfing the factory IC core volume by more than 3.3 times, the TurboXS Front Mount Intercooler bar and plate core is larger AND less restictive at high flow rates resulting in better cooling performance. Unlike other FMICs on the market, the WS-FMIC lets you keep your factory fog lights! Fits WRX MY2002-2005 and STi MY2004-2005. Core Demensions - 25x9.25x3.5 NOTE: A Short Ram intake like the TurboXS WS-INTAKE is required to install the WS-FMIC. The Kit Includes: Front Mount Intercooler Core Intercooler Piping Kit 4 Ply Silicone Couplers Stainless Steel T bolt Clamps Replacement Radiator Overflow Bottle TXS RBV34 Bypass Valve Subaru WRX/STi Intake Kit (WS-INTAKE) US$169.00 Short ram intake include billet aluminum MAF adapter, K&N pod filter, and mounting bracket. The TurboXS intake is engineered to maintain the correct mass air flow sensor signal leading avoiding some of the problems associated with running improperly designed intakes. KnockLite (KNOCKLITE) US$129.00 Detonation or "knocking" can destroy an engine in no time flat leaving you with a repair bill that can cost you thousands of dollars. So how do you KNOW that you are knocking BEFORE it's too late? The TurboXS KnockLite (TM) will detect even minor, inaudible detonation and flash the multicolored LED to alert you to the knock so that you can do something about it before it's too late. The KnockLite is a must-have product for anyone that is modifying their engine for more power. The KnockLite wires into either your factory knock sensor or into separate knock sensor (sold separately) that is mounted to your engine block. As an added bonus, the KnockLite also comes with a programmable shift indicator. So why drive around hoping that your engine isn't knocking? Drive with confidence with the TurboXS KnockLite! Tuner REG System, VW O2 sensor (Tuner-VW) US$399.00 This low cost, high performance air fuel ratio data logging unit is most efficiently used in conjunction with a UTEC or Dtec, but can be used as a standalone device. Fuel Cut Defender - 5 volt MAP (FCD - 5V) US$129.00 Finally a fuel cut defender that you don't have to hit fuel cut to adjust. Completely universal, this device allows you to raise your over-boost fuel cut so you can boost to your hearts content. While many devices completely eliminate the boost cut, the TurboXS FCD allows you to raise the fuel cut limit but still have an over-boost setting. Standard Boost Controller (BC-SBC) US$85.00 Simple, inexpensive, and effective way to control your boost level and generate more power from your engine. Bleed type boost controller allows you to increase boost approximately 12psi over your wastegate boost setting. High Perfomance Boost Controller (BC-HPBC) US$135.00 Utilizing a uniquely engineered ball/spring mechanism combine with an adjustable bleed valve, the BC-HPBC allows you to spool your turbo to full boost up to hundreds of RPM faster than stock! The adjustable bleed mechanism lets you minimize the massive boost "spike" that can occur with poorly designed ball/spring manual boost controllers. Dual Stage Boost Controller (BC-DSBC) US$249.00 The Dual Stage Boost Controller allows you to switch between two preset boost levels with the flip of a switch from inside the car. Got a high horsepower Front Wheel Drive turbocharged car that can't get off the line? Use the BC-DSBC to launch the car with low boost than switch to the second stage higher boost level for maximum top end power. High Performance Dual Stage Boost Controller (BC-HPDS) US$269.00 The TurboXS High Performance Dual Stage Boost controller provides the ultimate in dual stage boost control. Two preset boost levels allow you to switch from "street" to "race" boost with the flip of a switch from inside the cabin - even while under full boost. The first stage includes an adjustable ball/spring boost controller that help you to get to full boost quicker. Quad Stage Boost Controller (BC-QSBC) US$399.00 Initially designed for professional drag racers, the TurboXS Quad Stage Boost Controller provides the ultimate in boost related FWD traction control. Pro FWD drag racers Brian Ballard and Jason Hunt have been using this boost controller in the NOPI Turbo 4 Street class for the last 2 seasons. In 2004 they absolutely dominated the competition winning every race except one and managing to set two world records in the process. Jason’s CRX has run a best time of 9.53@154mph making it the world record holder for fastest FWD street car without wheelie bars. Jason’s coupe managed a 9.61@149mph setting the record for the world’s fastest street coupe. Now for the first time, we’ve made the Quad Stage Boost Controller available to the public as well as the professional drag racer. NOTE: While the BC-QSBC does come with wiring harness for all three solenoids, it does not come with any switching mechanism. It is left to the user to determine how to switch on each solenoid on, whether by using a timer, or a micro-switch off the gearbox, etc. Subaru WRX/STi Front Mount Intercooler Kit MY2006-2007 (WS-FMIC-0607) US$1,199.00 When massive flow and cooling is needed, the Turbo XS Front Mount Intercooler delivers. Dwarfing the factory IC core volume by more than 3.3 times, the TurboXS Front Mount Intercooler bar and plate core is larger AND less restictive at high flow rates resulting in better cooling performance. Additionally, unlike many other FMICs on the market, the TurboXS WS-FMIC-0607 lets you keep your factory fog lights intact! Fits WRX MY2006-2007 and STi MY2006-2007. Core Dimensions - 25x9.25x3.5 NOTE: A Short Ram intake like the TurboXS WS-INTAKE is required to install the WS-FMIC. The Kit Includes: Front Mount Intercooler Core Intercooler Piping Kit Silicone Couplers Stainless Steel T bolt Clamps Radiator Overflow Bottle TXS RBV34 Bypass Valve 02+ WRX G4 Type H Kit (H-WRXG4) US$39.00 Allows you to install a BOV-H or BOV-H-RFL to a 2002+ Subaru WRX or Subaru WRX STi. Blow Off Valve sold separately. Blow Off Valve Type H-RFL (BOV-RFL) US$189.00 With new and improved styling, the BOV-H-RFL remains true to it's roots - it's still really f'n loud! Like all our valves, the RFL relieves compressor pressure surge caused by changing gears or backing off the throttle and has been used on turbo charged engines running upto 35 psi boost. If you need to ask how loud it is, this valve is too loud for you! Blow Off Valve Type H-RFL comes standard with both a mild steel and aluminum weld-on adapters. Bolt-on kits are available for most OEM turbocharged applications. Blow Off Valve Type H: (BOV-H) US$179.00 Want a valve that people notice when it goes off but don't want "RFL-loud"? The BOV Type H is the valve for you. Providing greater venting flow than our BOV-S, the BOV-H is designed for turbo charged engines running up to 35 psi. Crafted from hard anodised aluminum and brass, the valve is practically indestructable. Cable, Tuner O2 VW (Cable-Tuner-O2-VW) US$99.00 Connects the Tuner or Tuner Pro's D15 cable to the Bosch VW O2 sensor. DTEC Air Temperature Sensor (DTEC-AIRT) US$99.00 The DTEC-AIRT sensor allows for an air temperature measurement when used in conjunction with the DTEC. Dtec Ana/Digi Pickup (DTEC-AD) US$39.00 The DTEC-AD allows the DTEC to monitor important engine parameters such as injector duty cycle, throttle position, or RPM. This kit includes one digital and one analog pick-up. Dtec EGT Sensor (DTEC-EGT) US$159.00 The DTEC-EGT is a high quality type K thermal couple that allows the DTEC to monitor and log exhaust gas temperatures. Dtec GBA Mount (DTECGBAMOUNT) US$49.00 With the DTEC Gameboy mount you can easily keep your Gameboy secure under the most extreme driving conditions. Dtec Sensor MAP (Dtec-MAP) US$99.00 The DTEC-MAP is a plug-in manifold absolute pressure sensor that allows the DTEC to measure and datalog boost pressures up to 45psi. DTEC-MAP also plugs directly into the 350Z-UTEC giving you the ability to tune forced induction 350Z's using Speed-Density tuning mode. TurboXS highly recommends purchasing this for forced induction 350Zs. Replacement Bosch Knock Sensor (Sensor-Knock-Bosch) US$99.00 This Bosch knock sensor is a replacement for the knock sensor that is included with the TurboXS Tuner-Pro. Sensor (Sensor-02-VW) US$79.00 Replacement Bosch VW o2 sensor for Tuner-VW or Tuner-Pro-VW products (Bosch Connector pictured) STI STAGE 1 Power Package 2004-2006 (STI-STAGE-1 0406) US$1,049.00 The TurboXS STI Stage 1 kits bumps your stock STI by 15 ft. lbs. and 20 whp for a final output 281 ft. lbs and 285 hp at the wheels. The power increase can be felt as early as 3,000 rpm all the way to redline. The power band is very broad to make for a fun car pulling out of those tights corners your STI was meant to carve. The Kit uses our User Tunable Delta Engine Management System, which gives you control of Boost, Timing and Fuel. A base map is loaded to give you instant gains right out of the box, so it will not need to be tweaked. Installation should only take 30 minutes tops with basic tools. The TurboXS STI Stage 1 Kit includes: Delta ECU Pre-programmed with a Stage 1 Map STI STAGE 2 Power Package 2004-2006 (STI-STAGE-2 0406) US$2,397.00 The TurboXS STI Stage 2 Kit is packed with the 3 greater things of modifying a Subaru sound, performance and style. We include our Short Ram intake which consists of a free flow air filter and CNC Extrude Housing to keep up with the airflow demands of your 2.5L beast. The sound is taken care of by adding a Full Turboback Exhaust. The exhaust features the industry first and only 4 inch bellmouth design downpipe, tapering to 3 inches to pair up with our high flow catalytic converter. We continue out our straight through muffler that is finished with our Blue Titanium Tip. The exhaust is polished to a mirror shine leaving your car with a show quality appearance. The sound is what only can be described as intoxicating. The combination of the Intake and Exhaust make the car breathe much easier in and out. The last piece to pull the complete package together is the use of our DELTA Engine Management System. The ability to tweak Fuel, Timing and Boost allows you persuade your STI to a 60 ft. lb & and 37 hp gain over stock at the wheels. Your final numbers will be somewhere around 327 ft. lbs and 304 hp at the the wheels. The TurboXS STI Stage 2 Kit Includes: WS-INTAKE WS-TBE-TI DELTA-003 with pre programmed Stage 2 base map UTEC Remote Map Selector Switch (UTEC-Switch) US$79.00 This Remote Map Switch allows you to switch between 5 programmed UTEC maps on the fly. *Only for use with UTEC, not compatible with DELTA ECU* WRX Rotated Mount Intercooler Pipe Kit (WS-RM-FMPIPE-0205) US$320.00 TurboXS Rotated Mount Intercooler Pipes, Silicone Hose and Stainless Steel T-bolt Clamps MAF Relocation Kit to move Mass Air Flow sensor after the turbocharger outlet for improved idle and low load driveability WS-FMIC which includes: Huge Bar and Plate FMIC Core 2.5” Diameter mandrel bent aluminum pipes All Silicone Hose Couplers and Stainless Steel T-bolt clamps WRX/STI Airflow (WS-AIRFLOW) US$79.00 Increases airflow through radiator Anodized aluminum Improves engine bay appearance Available July 2006. WRX/STI Cat Back Adapter Pipe (WS-CBAP) US$139.00 The TXS cat-back adapter allows you to use our 4 inch Bellmouth design downpipe with any cat-back exhaust system. WRX/STi Catalytic Convertor Pipe (WS-CP) US$239.00 WRX/STi Downpipe (WS-DP) US$369.00 The TXS downpipe is larger than any other WRX/Sti/FXT downpipe on the market. Why is that important? Because, despite what your girlfriend might tell you, size does matter. Turbochargers work best when there is large pressure and temperature differential across the turbine wheel. Having a large, free flowing downpipe is what give you that large pressure and temperature differential. The downpipe has a 4 inch cast bell mouth which tapers to 3 inch towards the flange end. The downpipe fits all 2002+ WRX, STI, FXT and LGT models although different Catpipes or Racepipes are needed. All TurboXS Exhaust components feature a 5 year warranty! Exhaust components fit both the manual and automatic 2002-04 WRX. *Turbo-back exhaust systems are for off road use only and are not street legal! WRX/STI Hybrid Valve (WS-HYB) US$219.00 The new Hybrid Valve gives your WRX or STi the subtlety of a recirculating Bypass Valve, combined with the power and sound of a Blowoff Valve. We recommend upgrading the factory valve when running boost above stock levels. * Built to last from solid aluminium and brass * Computer machined so there is no boost leak * Out-flows factory valves for improved throttle response * Direct replacement for WRX & STi factory bypass valve (MY2002+) WRX/STI Mid Pipe (WS-MP) US$159.00 The TurboXS 3 inch Mid Pipe for WRX & STi is compatible with all other TurboXS WRX & STi exhaust components.     * Full Stainless Steel construction     * CNC-Machined flanges for a perfect fit and seal     * O2 sensor bung for factory compatibility Requires a WS-DP; and either a WS-CP or WS-RP. WRX/STI Race Pipe (WS-RP) US$139.00 WRX/STI Rear Muffler (WS-RMA) US$409.00 WRX/STI Rear Muffler (WS-RMA-TI) US$439.00 A 3" straight through design unleashes all the power your engine can make. Unique flange design allows the RMA-TI to be bolted directly to either the factory mid-pipe or the TXS mid-pipe. WRX/STI Stealth Back Catless Exhaust System (WS-SBE-RP) US$667.00 Kit includes; 1x WS-DP (4 inch) 1x WS-RP (3 inch) 1x WS-MP (3 inch) WRX/STI Stealth Back Exhaust System (WS-SBE) US$767.00 Kit includes 1x WS-DP 1x WS-CP 1x WS-MP WRX/STI/FXT Replacement Exhaust Hardware kit (WS-EXHARDWARE) US$40.00 This hardware kit includes all the hardware that is included for free with a brand new TurboXS STI, WRX, or FXT exhaust system. Complete installation kit! WRX/STI/FXT Replacement Exhaust Hardware kit (WS-Exhardware) US$40.00 This hardware kit includes all the hardware that is included for free with a brand new TurboXS STI, WRX, or FXT exhaust system.