{"product_id":"garrett-g38-gxr38-turbine-housing-t4-v-band-0-85-ar-grt757707-0042","title":"Garrett G38\/GXR38 Turbine Housing Kit Div T4 \/ V-Band 0.85 A\/R","description":"\u003ch4\u003eExternally Wastegated T4 Divided Turbine Housing for G38 and GXR38 Builds\u003c\/h4\u003e\u003cp\u003eThe Garrett G38\/GXR38 Turbine Housing Kit T4 Divided \/ V-Band 0.85 A\/R (GRT757707-0042) is a stainless steel exhaust housing engineered for use with Garrett’s G38-1000 G-Series II and G-XRace GXR38-64 supercores in applications demanding T4 divided manifold compatibility and V-Band turbine outlet. The 0.85 A\/R ratio on GRT757707-0042 provides the quickest spool response in the G38 turbine housing family, making it the preferred choice for 2.0L to 4.0L builds where low-RPM boost response and mid-range power delivery are priorities. The T4 divided (twin-scroll) inlet design preserves exhaust gas pulse separation from the manifold for improved turbo response across the RPM range.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eGRT757707-0042 turbine housing for G38-1000 (938272-5003S) and GXR38-64 (934173-5008S \/ 934173-5009S) supercores\u003c\/li\u003e\n\u003cli\u003eT4 divided inlet flange for twin-scroll exhaust manifold compatibility and improved spool response\u003c\/li\u003e\n\u003cli\u003eV-Band turbine outlet for exhaust connection to downpipe or mid-pipe\u003c\/li\u003e\n\u003cli\u003e0.85 A\/R ratio provides fastest spool in the G38 family for responsive lower-displacement builds\u003c\/li\u003e\n\u003cli\u003eStainless steel construction for sustained high-temperature race use\u003c\/li\u003e\n\u003cli\u003eExternal wastegate only (no internal wastegate) for maximum boost control precision\u003c\/li\u003e\n\u003cli\u003eIncludes gasket kit, V-Band clamp, and mounting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eGRT757707-0042 \/ 757707-0042\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Supercores\u003c\/td\u003e\n\u003ctd\u003eG38-1000 (938272-5003S), GXR38-64 (934173-5008S, 934173-5009S)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTurbine Inlet\u003c\/td\u003e\n\u003ctd\u003eT4 Divided (twin-scroll)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTurbine Outlet\u003c\/td\u003e\n\u003ctd\u003eV-Band\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eA\/R Ratio\u003c\/td\u003e\n\u003ctd\u003e0.85\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWastegate Type\u003c\/td\u003e\n\u003ctd\u003eExternal only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003eVerify with Garrett distributor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eWhat’s Included\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1 x GRT757707-0042 G38\/GXR38 Turbine Housing\u003c\/li\u003e\n\u003cli\u003eGasket kit\u003c\/li\u003e\n\u003cli\u003eV-Band clamp for turbine outlet\u003c\/li\u003e\n\u003cli\u003eMounting hardware\u003c\/li\u003e\n\u003cli\u003eNote: Supercore sold separately\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eAbout Garrett Motion\u003c\/h4\u003e\u003cp\u003eGarrett Motion designs and manufactures turbine housing kits to precise tolerance specifications developed through decades of motorsport and OEM engineering. The G38 turbine housing family offers three A\/R options and two inlet configurations to optimize turbo performance for specific engine displacement and power target combinations.\u003c\/p\u003e\u003ch4\u003eFAQ\u003c\/h4\u003e\u003cstrong\u003eWhat is the GRT757707-0042?\u003c\/strong\u003e\u003cp\u003eThe GRT757707-0042 is a stainless steel turbine housing kit for Garrett G38 and GXR38 supercores, featuring a T4 divided (twin-scroll) inlet and V-Band outlet with a 0.85 A\/R ratio. It is sold as a standalone housing kit and requires a compatible G38 or GXR38 supercore to complete the turbocharger assembly.\u003c\/p\u003e\u003cstrong\u003eWhich supercores are compatible with GRT757707-0042?\u003c\/strong\u003e\u003cp\u003eGRT757707-0042 is compatible with the G38-1000 supercore (GRT938272-5003S) and the G-XRace GXR38-64 supercores (GRT934173-5008S and GRT934173-5009S). All supercores are sold separately.\u003c\/p\u003e\u003cstrong\u003eWhat is the difference between 0.85, 0.95, and 1.06 A\/R for the G38?\u003c\/strong\u003e\u003cp\u003eThe 0.85 A\/R (GRT757707-0042) provides the fastest spool and best low-RPM response, suited for smaller displacement engines or builds where response time is critical. The 0.95 A\/R (GRT757707-0043) balances response and peak flow. The 1.06 A\/R (GRT757707-0044) flows the most exhaust gas and suits high-RPM power builds on larger engines.\u003c\/p\u003e\u003cstrong\u003eDoes GRT757707-0042 work with an internal wastegate?\u003c\/strong\u003e\u003cp\u003eNo. All G38 series turbine housing kits are designed for external wastegate use only. An internal wastegate actuator is not available for this housing family.\u003c\/p\u003e\u003cstrong\u003eIs a V-Band clamp included?\u003c\/strong\u003e\u003cp\u003eYes. GRT757707-0042 includes a V-Band clamp for the turbine outlet, gasket kit, and mounting hardware. Weld flanges for the downpipe connection are not included.\u003c\/p\u003e\u003cstrong\u003eCan I use GRT757707-0042 on a 2.0L engine?\u003c\/strong\u003e\u003cp\u003eYes. The 0.85 A\/R T4 divided housing is well suited to 2.0L to 3.5L engine applications where fast spool and mid-range torque are the primary goals. For high-RPM, large-displacement builds, the 0.95 or 1.06 A\/R options may be more appropriate.\u003c\/p\u003e\u003cstrong\u003eAre G38 turbine housings interchangeable with G40 or G42 housings?\u003c\/strong\u003e\u003cp\u003eNo. G38 turbine housings are specific to the G38 frame and are not interchangeable with G40, G42, or other Garrett G-Series frames. Always verify the supercore frame size before purchasing a housing kit.\u003c\/p\u003e\u003cstrong\u003eWhat rotation is GRT757707-0042?\u003c\/strong\u003e\u003cp\u003eGRT757707-0042 is standard rotation. Reverse-rotation housings are separate part numbers and are not compatible with standard-rotation supercores.\u003c\/p\u003e\u003ch4\u003eInstallation Overview\u003c\/h4\u003e\u003col\u003e\n\u003cli\u003eVerify the G38 or GXR38 supercore is properly prepared with oil and coolant fittings installed\u003c\/li\u003e\n\u003cli\u003eAlign the turbine housing T4 divided inlet to the exhaust manifold T4 flange and bolt in place using the supplied hardware\u003c\/li\u003e\n\u003cli\u003eTorque housing fasteners to Garrett specification to prevent leaks under thermal expansion\u003c\/li\u003e\n\u003cli\u003eConnect the V-Band turbine outlet to the downpipe using the included V-Band clamp and an appropriate downpipe V-Band flange\u003c\/li\u003e\n\u003cli\u003eRoute the external wastegate dump port to your downpipe or dump tube\u003c\/li\u003e\n\u003cli\u003eComplete supercore oil and coolant line connections before first startup\u003c\/li\u003e\n\u003cli\u003eAllow initial idle period for oil circulation before operating under boost\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Garrett","offers":[{"title":"Default Title","offer_id":46152047853647,"sku":"GRT757707-0042","price":899.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/35726003208271_1.webp?v=1784815762","url":"https:\/\/www.blackopsautoworks.com\/products\/garrett-g38-gxr38-turbine-housing-t4-v-band-0-85-ar-grt757707-0042","provider":"Black Ops Auto Works","version":"1.0","type":"link"}