{"product_id":"grimmspeed-bb550-turbocharger-subaru-wrx-gd-wrx-sti-gd-gr-gv-va","title":"GrimmSpeed BB550+ Turbocharger - Subaru WRX (GD) \/ WRX STI (GD \/ GR \/ GV \/ VA)","description":"\u003ch2\u003eGrimmSpeed BB550+ Turbocharger - Subaru WRX (GD) \/ WRX STI (GD \/ GR \/ GV \/ VA)\u003c\/h2\u003e\u003cp\u003eThe GrimmSpeed BB550+ is the bigger of GrimmSpeed's two bolt-on, factory-location ball bearing turbos for the EJ257 WRX STI and the GD WRX, built on what GrimmSpeed learned from its BB500. A larger billet 2618 aluminium compressor wheel in a 0.77 A\/R housing and an Inconel 713C turbine wheel in a 10cm HiSiMo housing let it keep making power high in the rev range, while a torque bump around 4,500 rpm keeps it lively in the mid-range for a stock-location turbo.\u003c\/p\u003e\u003cp\u003eIt bolts into the factory turbo location with stock-style connections, so there is no cutting or custom fabrication. A new billet aluminium, dual-port wastegate actuator on a straight 6-gauge steel bracket holds boost steadier than a bent bracket that can flex, works with 3-port or 4-port boost control, and ships with a 15 psi base spring plus a spring pack to set base boost anywhere from 3 to 26 psi.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Suits the 2.5-litre EJ257 WRX STI (GD 2.5 from 2005, GR, GV and VA) and the 2001-2007 GD WRX (EJ205 and EJ255). Not for the 2.0-litre EJ207 WRX STI (GD to 2005, and Japanese-import STIs), which use a twin-scroll turbo. A custom ECU tune is required, and supporting fuel and exhaust upgrades may be needed for your power goal. Installation by a professional is recommended.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCeramic ball bearing centre section for quicker spool than a journal-bearing turbo\u003c\/li\u003e\n\u003cli\u003eBillet 2618 aluminium compressor wheel, 0.77 A\/R A356 aluminium compressor housing\u003c\/li\u003e\n\u003cli\u003eInconel 713C turbine wheel in a 10cm HiSiMo turbine housing\u003c\/li\u003e\n\u003cli\u003eCompressor flow of 73 lb\/min (about 33.1 kg\/min)\u003c\/li\u003e\n\u003cli\u003eBillet 6061 aluminium dual-port wastegate actuator, 3-port and 4-port boost control\u003c\/li\u003e\n\u003cli\u003eAdjustable base pressure from 3 to 26 psi with the included springs\u003c\/li\u003e\n\u003cli\u003eFactory-location bolt-on with no cutting or fabrication\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eGrimmSpeed test results\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBuilt-engine STI on E85 (GrimmSpeed dyno): about 530 whp and 465 lb-ft at the wheels, roughly 70 whp more than the BB500\u003c\/li\u003e\n\u003cli\u003eThat run was capped at 27 psi by the 1300cc injectors; GrimmSpeed says there is another 5-6 psi left in the turbo's efficiency range\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003eResults depend on the car, fuel, supporting parts and tune.\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003ePick the BB550+ for maximum top-end power on a well-supported build. For quicker response, see the \u003ca href=\"\/products\/grimmspeed-bb450-turbocharger-subaru-wrx-gd-wrx-sti-gd-gr-gv-va\"\u003eGrimmSpeed BB450+ Turbocharger - Subaru WRX (GD) \/ WRX STI (GD \/ GR \/ GV \/ VA)\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003ePairs Well With\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/grimmspeed-2-bolt-up-pipe-subaru-sti-gdb-grf-gvf-vab-wrx-gda-gga-ge8-gh8\"\u003eGrimmSpeed 2-Bolt Up-Pipe - Subaru STI (GDB\/GRF\/GVF\/VAB) \/ WRX (GDA\/GGA\/GE8\/GH8)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/grimmspeed-up-pipe-to-turbo-gasket-subaru-wrx-sti-gda-gga-gdb-grf-gvf-vab\"\u003eGrimmSpeed Up Pipe to Turbo Gasket - Subaru WRX\/STI (GDA\/GGA\/GDB\/GRF\/GVF\/VAB)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/grimmspeed-turbo-to-downpipe-gasket-wrx-gda-gga-ge8-gh8-sti-gdb-grf-vab\"\u003eGrimmSpeed Turbo to Downpipe Gasket - WRX (GDA\/GGA\/GE8\/GH8) \/ STI (GDB\/GRF\/VAB)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/grimmspeed-turbo-heat-shield-subaru-ej20-ej25\"\u003eGrimmSpeed Turbo Heat Shield - Subaru EJ20\/EJ25\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/id-xds-injectors-subaru-wrx-sti-48mm-set-of-4\"\u003eInjector Dynamics XDS Fuel Injectors - Subaru WRX \/ STI - 48mm Set of 4\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"chicane-links\"\u003eShop more: \u003ca href=\"\/collections\/grimmspeed\"\u003eGrimmSpeed\u003c\/a\u003e | \u003ca href=\"\/collections\/turbochargers\"\u003eTurbochargers\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003eNeed help confirming fitment? Contact our team at \u003ca href=\"mailto:sales@chicaneaustralia.com.au\"\u003esales@chicaneaustralia.com.au\u003c\/a\u003e.\u003c\/p\u003e","brand":"GrimmSpeed","offers":[{"title":"Default Title","offer_id":54402096693541,"sku":"GRM.1203.1.0","price":3745.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0918\/2943\/6709\/files\/GRM.1203.1.0-BB550_Turbo-1.jpg?v=1793947202","url":"https:\/\/www.chicaneaustralia.com.au\/products\/grimmspeed-bb550-turbocharger-subaru-wrx-gd-wrx-sti-gd-gr-gv-va","provider":"Chicane Australia","version":"1.0","type":"link"}