{"product_id":"granatelli-motor-sports-gms540261-44mm-piston-actuated-external-wastegate","title":"Granatelli Motor Sports GMS540261 44mm Piston-Actuated External Wastegate","description":"COMPACT PISTON BOOST CONTROL. PISTON CONTROL WITHOUT THE FOOTPRINT OF A BIG 50 OR 60MM GATE. The Granatelli 540261 44mm external wastegate combines compact packaging with a piston-actuated boost-control design for custom turbo systems where engine-bay space matters. It gives street, street\/strip and race-car builders a durable 44mm V-band turbo wastegate without using the diaphragm architecture found in Granatelli's water-cooled wastegate line. 44MM Compact Valve \/ PISTON Actuation Style \/ 5 SPRINGS Boost Tuning. Why This 44mm Turbo Wastegate? The compact 44mm size is easier to package around turbo manifolds, headers and exhaust plumbing while still providing external exhaust bypass control for many performance turbocharger systems. Product Specifications: Part Number: 540261; Product Type: External Turbo Wastegate; Valve Size: 44mm; Actuation: PISTON-ACTUATED; Top Cap: Black Anodized Billet Aluminum; Base: Stainless Steel; Mounting: V-Band Inlet \/ Outlet; Included: Flanges, Clamps \u0026amp; Five Variable-Rate Springs; Cooling: Air-Cooled (No Water Ports); Air Ports: 2 on Actuator Housing - Barbed Fittings \u0026amp; Port Plugs Included. Key Features \u0026amp; Benefits: Application-focused Granatelli Motor Sports design; Built for dependable performance and service; Designed for enthusiasts, professional installers, and performance builds. Fitment \u0026amp; Installation: Confirm the part number, vehicle or engine application, dimensions, and supporting components before installation. Modified vehicles may require additional clearance, fabrication, calibration, or related hardware depending on the combination. Frequently Asked Questions: Is the 540261 a piston or diaphragm wastegate? The 540261 is piston-actuated. It uses a mechanical piston instead of a flexible diaphragm to open the valve. It is a different part from the 44mm water-cooled diaphragm wastegate, Granatelli 540244, so check the part number, not just the size, when you order. Is the 540261 water-cooled? No.\nThe Granatelli 540261 44mm external wastegate combines compact packaging with a piston-actuated boost-control design for custom turbo systems where engine-bay space matters.\nConfirm the part number, vehicle or engine application, dimensions, and supporting components before installation. Modified vehicles may require additional clearance, fabrication, calibration, or related hardware depending on the combination.\n\u003cul\u003e\n  \u003cli\u003eDesigned for enthusiasts, professional installers, and performance builds\u003c\/li\u003e\n  \u003cli\u003eApplication-focused Granatelli Motor Sports design\u003c\/li\u003e\n  \u003cli\u003eBuilt for dependable performance and service\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Granatelli Motor Sports GMS540261 is a compact 44mm external turbo wastegate designed for custom turbo systems where engine-bay space matters. Its piston-actuated boost-control design provides external exhaust bypass control without the diaphragm architecture used in Granatelli's water-cooled wastegate line.\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Performance Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact 44mm valve:\u003c\/strong\u003e Supports easier packaging around turbo manifolds, headers, and exhaust plumbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston actuation:\u003c\/strong\u003e Uses a mechanical piston to open the valve for boost control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eV-band mounting:\u003c\/strong\u003e Provides V-band inlet and outlet connections for compatible turbo-system installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFive variable-rate springs:\u003c\/strong\u003e Offers boost-tuning options for performance builds.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Product Specifications \u0026amp; Technical Data\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Granatelli Motor Sports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e GMS540261\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e External turbo wastegate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve size:\u003c\/strong\u003e 44mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActuation:\u003c\/strong\u003e Piston-actuated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop cap:\u003c\/strong\u003e Black anodized billet aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase:\u003c\/strong\u003e Stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling and air ports:\u003c\/strong\u003e Air-cooled with two actuator-housing air ports; no water ports\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cp\u003eIncludes flanges, clamps, five variable-rate springs, barbed fittings, and port plugs. Confirm the part number, vehicle or engine application, dimensions, and supporting components before installation. Modified vehicles may require additional clearance, fabrication, calibration, or related hardware depending on the combination. This product is not CARB approved.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eAir Freight Prohibited: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eNot Carb Approved: true\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eCarb Acknowledgement Required: true\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLtl Freight Required: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eProp 65: Y\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003ePart Type: automotive\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eEpa: N\/A\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eUnits Per Sku: 1\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eRegular Stock: t\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Granatelli Motor Sports","offers":[{"title":"Default Title","offer_id":68100378722556,"sku":"540261","price":274.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0641\/6518\/3740\/files\/7824d548fef625f04ef408b769f199abL.png?v=1794277326","url":"https:\/\/diycustoms.store\/products\/granatelli-motor-sports-gms540261-44mm-piston-actuated-external-wastegate","provider":"diycustoms.store","version":"1.0","type":"link"}