{"product_id":"granatelli-44mm-piston-actuated-wastegate","title":"Granatelli 44mm Piston-Actuated External Wastegate with V-Band","description":"\u003ch4\u003eControl boost without the footprint of a larger gate\u003c\/h4\u003e\u003cp\u003eGranatelli Motor Sports 540261 is the exact external turbo wastegate described here. Compact 44 mm valve for custom turbo-system packaging, matched to the verified configuration and application below.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCompact 44 mm valve for custom turbo-system packaging\u003c\/li\u003e\n\u003cli\u003ePiston-actuated design rather than a water-cooled diaphragm\u003c\/li\u003e\n\u003cli\u003eBlack anodized billet aluminum top cap\u003c\/li\u003e\n\u003cli\u003eStainless steel base with V-band inlet and outlet\u003c\/li\u003e\n\u003cli\u003eFive variable-rate springs support base-boost setup\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003cp\u003eNo year-make-model fitment applies; match every engine-family, dimensional, mounting and electrical requirement below.\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel or Application\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eCustom\u003c\/td\u003e\n\u003ctd\u003eTurbo system\u003c\/td\u003e\n\u003ctd\u003eRequires compatible 44 mm V-band plumbing, pressure reference, exhaust routing and verified spring setup\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number\u003c\/td\u003e\n\u003ctd\u003e540261\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGranatelli Motor Sports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eExternal Turbo Wastegate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Size\u003c\/td\u003e\n\u003ctd\u003e44 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActuation\u003c\/td\u003e\n\u003ctd\u003ePiston\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop Cap\u003c\/td\u003e\n\u003ctd\u003eBlack anodized billet aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnections\u003c\/td\u003e\n\u003ctd\u003eV-band inlet and outlet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStore GTIN\u003c\/td\u003e\n\u003ctd\u003e802735045468; corroborated for this exact MPN by an active distributor listing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eOne 44 mm piston-actuated external wastegate\u003c\/li\u003e\n\u003cli\u003eV-band inlet and outlet flanges\u003c\/li\u003e\n\u003cli\u003eV-band clamps\u003c\/li\u003e\n\u003cli\u003eFive variable-rate springs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eAbout Granatelli Motor Sports\u003c\/h4\u003e\u003cp\u003eGranatelli Motor Sports develops performance cooling, forced-induction and racing-control components. Selection depends on the exact part number, physical interface and intended operating system rather than appearance alone.\u003c\/p\u003e\u003ch4\u003eRelated Parts\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eOnly hoses, seals, wiring or mounting hardware verified for this exact component\u003c\/li\u003e\n\u003cli\u003eCooling-system service supplies for thermostat-housing installations\u003c\/li\u003e\n\u003cli\u003eCircuit protection and connectors matched to the controlled electrical load\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFAQ\u003c\/h4\u003e\u003cstrong\u003eWhat is the 540261?\u003c\/strong\u003e\u003cp\u003eIt is the Granatelli Motor Sports external turbo wastegate in the exact configuration and application described on this page.\u003c\/p\u003e\u003cstrong\u003eHow should compatibility be confirmed?\u003c\/strong\u003e\u003cp\u003eMatch every application, dimension, mounting point, interface and exclusion shown in the Fitment and Specifications sections.\u003c\/p\u003e\u003cstrong\u003eIs the pictured configuration the item being sold?\u003c\/strong\u003e\u003cp\u003eYes. The retained gallery shows the verified product configuration and quantity; standalone logos and text-only graphics are excluded.\u003c\/p\u003e\u003cstrong\u003eAre unrelated installation parts included?\u003c\/strong\u003e\u003cp\u003eNo. Components not shown or listed in What's Included must be sourced separately when the installation requires them.\u003c\/p\u003e\u003cstrong\u003eIs professional installation recommended?\u003c\/strong\u003e\u003cp\u003eYes when the work affects brakes, cooling, wiring, vehicle safety or calibrated operating systems.\u003c\/p\u003e\u003cstrong\u003eCan a similar-looking part be substituted?\u003c\/strong\u003e\u003cp\u003eNo. Similar products can differ in mounting geometry, temperature, rotor pattern, wiring, dimensions or included components.\u003c\/p\u003e\u003cstrong\u003eWhat should be inspected before installation?\u003c\/strong\u003e\u003cp\u003eInspect the mating surfaces, mounting points, hoses or wiring, clearances and every included component before modifying the vehicle.\u003c\/p\u003e\u003cstrong\u003eWhat warranty applies?\u003c\/strong\u003e\u003cp\u003eUse the current Granatelli Motor Sports warranty terms for this exact product and application.\u003c\/p\u003e\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\u003col\u003e\n\u003cli\u003eConfirm that the turbo system is designed for a 44 mm external piston-actuated wastegate with compatible V-band inlet and outlet connections.\u003c\/li\u003e\n\u003cli\u003ePlan the wastegate position and exhaust routing so the valve, actuator, reference lines and dump or recirculation tube clear heat-sensitive and moving components.\u003c\/li\u003e\n\u003cli\u003eInstall the verified spring combination for the intended base boost pressure using the current manufacturer procedure.\u003c\/li\u003e\n\u003cli\u003eWeld or install the supplied flanges in the correct orientation, then secure the wastegate with the supplied V-band clamps.\u003c\/li\u003e\n\u003cli\u003eConnect pressure-reference plumbing to the correct ports and verify that every hose is protected from heat and abrasion.\u003c\/li\u003e\n\u003cli\u003ePressure-test the system, confirm free valve movement and inspect every exhaust and reference connection for leaks.\u003c\/li\u003e\n\u003cli\u003eBegin boost testing at low load with appropriate monitoring, then verify stable control before increasing engine load or commanded boost.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Granatelli Motor Sports","offers":[{"title":"Default Title","offer_id":68067738517583,"sku":"GMS540261","price":256.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/granatelli-motor-sports-540261-external-turbo-wastegate-01.webp?v=1794237478","url":"https:\/\/www.blackopsautoworks.com\/products\/granatelli-44mm-piston-actuated-wastegate","provider":"Black Ops Auto Works","version":"1.0","type":"link"}