{"title":"HS4 HIF38\/4 H4 SU","description":null,"products":[{"product_id":"2halfinchsustack","title":"2.5\" SU Carb HS4 HIF38\/4 H4 Ram Pipe Trumpet","description":"\u003ch2\u003eVortex 2.5\" Velocity Stack for SU Carburettors – 35mm Intake\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eOne 3D-printed 2.5\" tall “Vortex” velocity stack for SU carburettors with a 35mm intake.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDesigned to improve intake performance, this longer Vortex velocity stack provides a smooth bellmouth-style entry into the carburettor and is designed for compatible SU applications.\u003c\/p\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned to fit:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSU HS4\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSU HIF 38\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSU H4\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSU HIF4\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThese carburettors are commonly used across a wide range of classic British vehicles, including \u003cstrong\u003eMinis, Jaguars, Triumphs, MGs and other compatible applications\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e2.5\" tall Vortex velocity stack\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e35mm intake size\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eDesigned for compatible SU carburettors\u003c\/li\u003e\n\u003cli\u003eDesigned to improve intake airflow and performance\u003c\/li\u003e\n\u003cli\u003eSmooth bellmouth-style intake entry\u003c\/li\u003e\n\u003cli\u003eLonger 2.5\" design for applications where additional stack length is desired\u003c\/li\u003e\n\u003cli\u003eManufactured from \u003cstrong\u003ehigh-temperature-resistant PETG\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eOther sizes and lengths available\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e ★☆☆☆☆\u003cbr\u003e\u003cstrong\u003eEstimated Time:\u003c\/strong\u003e Approximately 10–20 minutes, depending on carburettor setup\u003c\/p\u003e\u003cp\u003eThe velocity stack is designed to fit directly to the compatible SU carburettor using the existing mounting arrangement.\u003c\/p\u003e\u003cp\u003eBefore use, ensure the stack is securely fitted and that there is sufficient clearance within the engine bay, particularly with the increased 2.5\" length.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003e1 × 2.5\" Vortex velocity stack – 35mm intake\u003c\/strong\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCarburettor NOT included.\u003c\/strong\u003e\u003c\/p\u003e\u003ch3\u003eMaterial \u0026amp; Finish\u003c\/h3\u003e\u003cp\u003eManufactured from \u003cstrong\u003ehigh-temperature-resistant PETG plastic\u003c\/strong\u003e, providing a durable solution for automotive applications.\u003c\/p\u003e\u003ch3\u003eCustom Options\u003c\/h3\u003e\u003cp\u003eOther \u003cstrong\u003eintake sizes and velocity stack lengths\u003c\/strong\u003e are also available.\u003c\/p\u003e\u003cp\u003ePlease get in touch if you require a different size or configuration.\u003c\/p\u003e\u003cp\u003eFor the same 35mm SU fitment, compare the \u003ca href=\"\/products\/1halfinchsustack\"\u003e\u003cstrong\u003e1.5\" Vortex stack (IP-0045)\u003c\/strong\u003e\u003c\/a\u003e or \u003ca href=\"\/products\/2inchsustack\"\u003e\u003cstrong\u003e2\" Vortex stack (IP-0044)\u003c\/strong\u003e\u003c\/a\u003e. If your carburettor is an \u003cstrong\u003eSU HIF44\u003c\/strong\u003e, use the dedicated \u003ca href=\"\/products\/hiff44sustack2inch\"\u003e\u003cstrong\u003eHIF44 2\" Vortex stack (IP-0010)\u003c\/strong\u003e\u003c\/a\u003e instead.\u003c\/p\u003e\u003ch3\u003eImportant Information\u003c\/h3\u003e\u003cp\u003eThis is an \u003cstrong\u003eaftermarket IPNG performance component\u003c\/strong\u003e and is not manufactured by or affiliated with SU, Mini, Jaguar, Triumph or MG.\u003c\/p\u003e\u003cp\u003ePlease ensure the selected velocity stack provides adequate clearance within your specific engine bay and intake setup before installation.\u003c\/p\u003e\u003ch3\u003eIPNG Part Number\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIPNG SKU: IP-0046\u003c\/strong\u003e\u003c\/p\u003e\u003ch3\u003eVortex Fitment \u0026amp; Selection Guide\u003c\/h3\u003e\u003cp\u003eNot sure which Vortex stack is right for your carburettor? Use our \u003ca href=\"\/blogs\/installation-guides\/vortex-velocity-stack-fitment-selection-guide\"\u003e\u003cstrong\u003eVortex velocity stack fitment \u0026amp; selection guide\u003c\/strong\u003e\u003c\/a\u003e to compare carburettor fitment, intake or bore size, stack height and IPNG part number.\u003c\/p\u003e","brand":"IPNG Automotive","offers":[{"title":"Default Title","offer_id":58383146090831,"sku":"IP-0046","price":19.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1031\/7729\/0063\/files\/imgi_102_s-l1600.png?v=1786099582"},{"product_id":"1halfinchsustack","title":"1.5\" HS4 HIF38\/4 H4 SU Carb Ram Pipe Trumpet","description":"\u003ch2\u003eVortex 1.5\" Velocity Stack for SU Carburettors – 35mm Intake\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eOne 3D-printed 1.5\" tall “Vortex” velocity stack for SU carburettors with a 35mm intake.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDesigned to improve intake flow, this Vortex velocity stack has been developed with the \u003cstrong\u003eA-Series engine tuning principles discussed in the highly regarded works of David Vizard\u003c\/strong\u003e in mind.\u003c\/p\u003e\u003cp\u003eDevelopment testing indicated an \u003cstrong\u003eapproximately 5.2% improvement in intake flow over the standard A-Series setup\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe Vortex design provides a smooth, controlled transition into the carburettor, helping optimise airflow into the engine.\u003c\/p\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned to fit:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSU HS4\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSU HIF 38\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSU H4\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSU HIF4\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThese carburettors are commonly found across a wide range of classic British vehicles, including \u003cstrong\u003eMinis, Jaguars, Triumphs, MGs and other compatible applications\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e1.5\" tall Vortex velocity stack\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e35mm intake size\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eDesigned for compatible SU carburettors\u003c\/li\u003e\n\u003cli\u003eVortex internal design developed to optimise intake airflow\u003c\/li\u003e\n\u003cli\u003eApproximately \u003cstrong\u003e5.2% increased intake flow\u003c\/strong\u003e over the standard A-Series setup during development testing\u003c\/li\u003e\n\u003cli\u003eDeveloped with reference to \u003cstrong\u003eDavid Vizard's A-Series engine tuning principles\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSmooth bellmouth-style intake entry\u003c\/li\u003e\n\u003cli\u003eManufactured from \u003cstrong\u003ehigh-temperature-resistant plastic\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eOther sizes and lengths available\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e ★☆☆☆☆\u003cbr\u003e\u003cstrong\u003eEstimated Time:\u003c\/strong\u003e Approximately 10–20 minutes, depending on carburettor setup\u003c\/p\u003e\u003cp\u003eThe velocity stack is designed to fit directly to the compatible SU carburettor using the existing mounting arrangement.\u003c\/p\u003e\u003cp\u003eBefore use, ensure the stack is securely fitted and that there is sufficient clearance within the engine bay.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003e1 × 1.5\" Vortex velocity stack – 35mm intake\u003c\/strong\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCarburettor NOT included.\u003c\/strong\u003e\u003c\/p\u003e\u003ch3\u003eMaterial \u0026amp; Finish\u003c\/h3\u003e\u003cp\u003e3D printed using \u003cstrong\u003ehigh-temperature-resistant plastic\u003c\/strong\u003e, making it suitable for use within demanding automotive environments.\u003c\/p\u003e\u003ch3\u003eCustom Options\u003c\/h3\u003e\u003cp\u003eOther \u003cstrong\u003eintake sizes and velocity stack lengths\u003c\/strong\u003e are available.\u003c\/p\u003e\u003cp\u003ePlease get in touch if you require a different size or configuration.\u003c\/p\u003e\u003cp\u003eFor the same 35mm SU fitment, compare the \u003ca href=\"\/products\/2inchsustack\"\u003e\u003cstrong\u003e2\" Vortex stack (IP-0044)\u003c\/strong\u003e\u003c\/a\u003e or longer \u003ca href=\"\/products\/2halfinchsustack\"\u003e\u003cstrong\u003e2.5\" Vortex stack (IP-0046)\u003c\/strong\u003e\u003c\/a\u003e. If your carburettor is an \u003cstrong\u003eSU HIF44\u003c\/strong\u003e, use the dedicated \u003ca href=\"\/products\/hiff44sustack2inch\"\u003e\u003cstrong\u003eHIF44 2\" Vortex stack (IP-0010)\u003c\/strong\u003e\u003c\/a\u003e instead.\u003c\/p\u003e\u003ch3\u003eImportant Information\u003c\/h3\u003e\u003cp\u003eThis is an \u003cstrong\u003eaftermarket IPNG performance component\u003c\/strong\u003e and is not manufactured by or affiliated with SU, Mini, Jaguar, Triumph or MG.\u003c\/p\u003e\u003cp\u003eThe stated airflow improvement is based on development testing and may vary depending on the specific carburettor, engine and intake configuration.\u003c\/p\u003e\u003ch3\u003eIPNG Part Number\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIPNG SKU: IP-0045\u003c\/strong\u003e\u003c\/p\u003e\u003ch3\u003eVortex Fitment \u0026amp; Selection Guide\u003c\/h3\u003e\u003cp\u003eNot sure which Vortex stack is right for your carburettor? Use our \u003ca href=\"\/blogs\/installation-guides\/vortex-velocity-stack-fitment-selection-guide\"\u003e\u003cstrong\u003eVortex velocity stack fitment \u0026amp; selection guide\u003c\/strong\u003e\u003c\/a\u003e to compare carburettor fitment, intake or bore size, stack height and IPNG part number.\u003c\/p\u003e","brand":"IPNG Automotive","offers":[{"title":"Default Title","offer_id":58383146156367,"sku":"IP-0045","price":19.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1031\/7729\/0063\/files\/imgi_126_s-l1600_4ec6c4a2-72e4-4989-9880-f865367e5905.png?v=1785977078"},{"product_id":"2inchsustack","title":"2\" SU Carb HS4 HIF38\/4 H4 Ram Pipe Trumpet","description":"\u003ch2\u003eVortex 2\" Velocity Stack for SU Carburettors – 35mm Intake\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eOne 3D-printed 2\" tall “Vortex” velocity stack for SU carburettors with a 35mm intake.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDesigned to improve the airflow characteristics of the intake system, this Vortex velocity stack has been developed with the \u003cstrong\u003eA-Series engine tuning principles discussed in the highly regarded works of David Vizard\u003c\/strong\u003e in mind.\u003c\/p\u003e\u003cp\u003eTesting during development indicated an \u003cstrong\u003eapproximately 5.2% improvement in intake flow over the standard A-Series setup\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe integrated Vortex design is intended to provide a smoother, more controlled transition into the carburettor, helping optimise airflow into the engine.\u003c\/p\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned to fit the following \u003cstrong\u003eSU carburettors\u003c\/strong\u003e:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHS4\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eHIF 38\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eH4\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eHIF4\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThese carburettors are commonly found across a wide range of classic British vehicles, including:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eClassic Mini\u003c\/li\u003e\n\u003cli\u003eJaguar\u003c\/li\u003e\n\u003cli\u003eTriumph\u003c\/li\u003e\n\u003cli\u003eMG\u003c\/li\u003e\n\u003cli\u003eAnd many other applications using compatible SU carburettors\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e2\" tall Vortex velocity stack\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e35mm intake size\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for compatible SU carburettors\u003c\/li\u003e\n\u003cli\u003eVortex internal design developed to optimise airflow\u003c\/li\u003e\n\u003cli\u003eApproximately \u003cstrong\u003e5.2% increased intake flow\u003c\/strong\u003e over the standard A-Series setup during development testing\u003c\/li\u003e\n\u003cli\u003eDeveloped with reference to \u003cstrong\u003eDavid Vizard's A-Series engine tuning principles\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSmooth bellmouth-style intake entry\u003c\/li\u003e\n\u003cli\u003eHigh-temperature-resistant construction\u003c\/li\u003e\n\u003cli\u003eOther sizes and lengths available\u003c\/li\u003e\n\u003cli\u003eIdeal for classic British performance and restoration applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e ★☆☆☆☆\u003cbr\u003e\u003cstrong\u003eEstimated Time:\u003c\/strong\u003e Approximately 10–20 minutes, depending on carburettor setup\u003c\/p\u003e\u003cp\u003eThe velocity stack is designed to fit directly to the compatible SU carburettor using the existing mounting arrangement.\u003c\/p\u003e\u003cp\u003eAlways ensure the velocity stack is securely fitted and that there is adequate clearance within the engine bay before operating the vehicle.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003e1 × 2\" Vortex velocity stack – 35mm intake\u003c\/strong\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCarburettor NOT included.\u003c\/strong\u003e\u003c\/p\u003e\u003ch3\u003eMaterial \u0026amp; Finish\u003c\/h3\u003e\u003cp\u003eManufactured using \u003cstrong\u003ehigh-temperature-resistant plastic\u003c\/strong\u003e for durability in automotive applications.\u003c\/p\u003e\u003ch3\u003eCustom Options\u003c\/h3\u003e\u003cp\u003eOther \u003cstrong\u003eintake sizes and velocity stack lengths\u003c\/strong\u003e are also available.\u003c\/p\u003e\u003cp\u003eIf you require a different size or configuration, please get in touch to discuss your requirements.\u003c\/p\u003e\u003cp\u003eFor the same 35mm SU fitment, compare the shorter \u003ca href=\"\/products\/1halfinchsustack\"\u003e\u003cstrong\u003e1.5\" Vortex stack (IP-0045)\u003c\/strong\u003e\u003c\/a\u003e or longer \u003ca href=\"\/products\/2halfinchsustack\"\u003e\u003cstrong\u003e2.5\" Vortex stack (IP-0046)\u003c\/strong\u003e\u003c\/a\u003e. If your carburettor is an \u003cstrong\u003eSU HIF44\u003c\/strong\u003e, use the dedicated \u003ca href=\"\/products\/hiff44sustack2inch\"\u003e\u003cstrong\u003eHIF44 2\" Vortex stack (IP-0010)\u003c\/strong\u003e\u003c\/a\u003e instead.\u003c\/p\u003e\u003ch3\u003eImportant Information\u003c\/h3\u003e\u003cp\u003eThis is an \u003cstrong\u003eaftermarket IPNG performance component\u003c\/strong\u003e and is not manufactured by or affiliated with SU, Mini, Jaguar, Triumph or MG.\u003c\/p\u003e\u003cp\u003eThe stated airflow improvement is based on development testing and may vary depending on the specific carburettor, engine and intake configuration.\u003c\/p\u003e\u003ch3\u003eIPNG Part Number\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIPNG SKU: IP-0044\u003c\/strong\u003e\u003c\/p\u003e\u003ch3\u003eVortex Fitment \u0026amp; Selection Guide\u003c\/h3\u003e\u003cp\u003eNot sure which Vortex stack is right for your carburettor? Use our \u003ca href=\"\/blogs\/installation-guides\/vortex-velocity-stack-fitment-selection-guide\"\u003e\u003cstrong\u003eVortex velocity stack fitment \u0026amp; selection guide\u003c\/strong\u003e\u003c\/a\u003e to compare carburettor fitment, intake or bore size, stack height and IPNG part number.\u003c\/p\u003e","brand":"IPNG Automotive","offers":[{"title":"Default Title","offer_id":58383146123599,"sku":"IP-0044","price":19.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1031\/7729\/0063\/files\/imgi_166_s-l1600.png?v=1785976882"}],"url":"https:\/\/ipng.store\/collections\/hs4-hif38-4-h4-su.oembed","provider":"IPNG Automotive","version":"1.0","type":"link"}