{"product_id":"granatelli-hd-4-00-clamshell-318540cs","title":"Granatelli Motor Sports HD 4.00 Inch Clamshell 318540CS","description":"\u003ch2\u003eGranatelli Motor Sports Dual Seal HD 4.0 Inch Tubing Coupler Clamp\u003c\/h2\u003e\n\u003ch2\u003eSKU: 318540CS\u003c\/h2\u003e\n\u003ch2\u003eHeavy-Duty Quick-Release Clamshell Clamp for Extreme Turbo and High-Boost Applications\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eGranatelli Motor Sports Dual Seal HD 4.0 Inch Tubing Coupler Clamp\u003c\/strong\u003e is built for extreme-performance applications where maximum airflow, boost retention, and reliability are non-negotiable. Precision-machined from \u003cstrong\u003eT-6061 aluminum\u003c\/strong\u003e, this clamp is engineered to handle the demands of high-horsepower turbocharged and forced-induction systems while maintaining a clean, professional appearance.\u003c\/p\u003e\n\u003cp\u003eFeaturing Granatelli’s \u003cstrong\u003epatented pin-and-ball quick-release clamping mechanism\u003c\/strong\u003e, this clamshell-style clamp provides a secure mechanical lock that resists vibration, heat cycling, and extreme boost pressure. Designed for \u003cstrong\u003e4.0-inch (102mm) tubing couplers\u003c\/strong\u003e, it delivers consistent, leak-free sealing in large-diameter intake and charge pipe systems.\u003c\/p\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTubing Coupler Type:\u003c\/strong\u003e Straight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e T-6061 Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Diameter:\u003c\/strong\u003e 4.00 in. (102.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Diameter:\u003c\/strong\u003e 4.00 in. (102.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e Sold individually\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePerformance Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDual-seal HD design for maximum boost retention and leak prevention\u003c\/li\u003e\n\u003cli\u003ePin-and-ball quick-release system for fast installation and servicing\u003c\/li\u003e\n\u003cli\u003eVibration-resistant under extreme boost and engine movement\u003c\/li\u003e\n\u003cli\u003eMaintains sealing integrity under high pressure and elevated temperatures\u003c\/li\u003e\n\u003cli\u003eIdeal for repeated disassembly without clamp fatigue or loss of clamping force\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eIncluded Components\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOne heavy-duty outer clamp assembly\u003c\/li\u003e\n\u003cli\u003eOne ball\/pin safety retention pin\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDesigned for professional fabricators, racers, and serious performance enthusiasts, the \u003cstrong\u003eGranatelli Motor Sports Dual Seal HD 4.0 Inch Clamshell Clamp\u003c\/strong\u003e is the ideal solution for \u003cstrong\u003elarge-frame turbo systems, high-boost charge piping, intercooler connections, and extreme horsepower builds\u003c\/strong\u003e. When airflow, strength, and serviceability matter most, Granatelli Motor Sports delivers proven performance.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\u003chr\u003e\u003ch3 style=\"margin-bottom:10px; color:#111111;\"\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eApplication-focused Granatelli Motor Sports design\u003c\/li\u003e\n\u003cli\u003eBuilt for dependable performance and service\u003c\/li\u003e\n\u003cli\u003eDesigned for enthusiasts, professional installers, and performance builds\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3 style=\"margin-bottom:10px; color:#111111;\"\u003eFitment \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eConfirm 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.\u003c\/p\u003e\u003chr\u003e\u003ch3 style=\"margin-bottom:10px; color:#111111;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eHow do I confirm fitment?\u003c\/strong\u003e\u003cbr\u003eMatch the part number and listed application to your vehicle, engine, dimensions, and supporting components before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this work on a modified vehicle?\u003c\/strong\u003e\u003cbr\u003eCompatibility depends on the complete vehicle combination. Confirm the listed application and supporting components before installation.\u003c\/p\u003e\u003chr\u003e\u003ch3 style=\"margin-bottom:10px; color:#111111;\"\u003eWhy Choose Granatelli Motor Sports?\u003c\/h3\u003e\u003cp\u003eGranatelli Motor Sports develops performance components for real-world street, street\/strip, race, and custom applications, with an emphasis on practical performance, dependable construction, and integration into serious automotive builds.\u003c\/p\u003e","brand":"Granatelli Motor Sports","offers":[{"title":"Default Title","offer_id":46910311104668,"sku":"318540CS","price":109.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/9826\/2684\/files\/F198645688.jpg?v=1779219146","url":"https:\/\/granatellimotorsports.com\/products\/granatelli-hd-4-00-clamshell-318540cs","provider":"Granatelli Motor Sports, Inc.","version":"1.0","type":"link"}