{"product_id":"ford-cosworth-yb-turbo-manifold-large-primary","title":"Turbo Manifold Ford YB Large Primary","description":"\u003ch2 class=\"PDq2pG_selectionAnchorContainer\"\u003eFord Cosworth YB Large Primary Turbo Manifold\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp\u003eDeveloped for \u003cstrong\u003ehigh-output Ford Cosworth YB combinations requiring greater exhaust-flow capacity\u003c\/strong\u003e, the Walton Motorsport Large Primary Turbo Manifold uses \u003cstrong\u003e42.56 mm ID primary runners\u003c\/strong\u003e to support higher-horsepower, higher-RPM and larger-displacement YB builds. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThis is the higher-flow alternative to Walton Motorsport's standard YB manifold and is intended for engines where outright airflow and top-end performance justify moving away from the smaller, more response-focused primary configuration.\u003c\/p\u003e\n\u003ch3\u003eFord Cosworth YB Turbo Manifold - 42.56 mm ID Large Primary Runners\u003c\/h3\u003e\n\u003cp\u003eThe defining feature of this manifold is its \u003cstrong\u003e42.56 mm internal-diameter primary runners\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eIncreasing primary diameter provides additional exhaust-flow capacity for heavily developed YB engines operating at greater engine speeds, displacement and power levels.\u003c\/p\u003e\n\u003cp\u003eThe trade-off is straightforward: where the standard manifold prioritises a broader balance between gas speed, response and flow, the \u003cstrong\u003eLarge Primary shifts that balance towards high-RPM airflow and power potential\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eFord Cosworth YB Turbo Manifold - Built for Serious YB Engine Combinations\u003c\/h3\u003e\n\u003cp\u003eThe Large Primary is particularly relevant to YB builds where increased displacement, cylinder-head flow, turbocharger capacity or sustained high-RPM operation means the standard manifold is becoming a restriction.\u003c\/p\u003e\n\u003cp\u003eIt is therefore not automatically the better manifold simply because the engine is modified.\u003c\/p\u003e\n\u003cp\u003eFor many road, rally, circuit and responsive competition combinations, the standard manifold may remain the better match. The Large Primary should be selected when the \u003cstrong\u003eengine combination actually requires the additional runner capacity\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eFord Cosworth YB Turbo Manifold - Modern V-Band Turbo Options\u003c\/h3\u003e\n\u003cp\u003eThe Large Primary manifold is currently configured for \u003cstrong\u003eGarrett V-Band G25, G30 and G35 turbochargers, including GTX30 and GTX35 applications\u003c\/strong\u003e. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe turbocharger should be selected around the complete engine combination and intended powerband, particularly given the increased airflow capability of the larger-primary manifold.\u003c\/p\u003e\n\u003ch3\u003eFord Cosworth YB Turbo Manifold - Wastegate \u0026amp; Boost Control\u003c\/h3\u003e\n\u003cp\u003eThe manifold features a \u003cstrong\u003e40–50 mm external wastegate port\u003c\/strong\u003e, supplied without a flange fitted.\u003c\/p\u003e\n\u003cp\u003eThis allows the final wastegate specification and position to be selected around the turbocharger, boost target and vehicle installation.\u003c\/p\u003e\n\u003ch3\u003eFord Cosworth YB Turbo Manifold - Important Fitment Difference\u003c\/h3\u003e\n\u003cp\u003eThe Large Primary manifold is compatible with the \u003cstrong\u003eSmith \u0026amp; Jones block\u003c\/strong\u003e, but \u003cstrong\u003edoes not fit Mk1 or Mk2 Escort applications\u003c\/strong\u003e. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThat's an important distinction from Walton Motorsport's standard YB manifold, which has been specifically developed to accommodate Mk1\/Mk2 Escort YB conversions subject to the documented installation modifications.\u003c\/p\u003e\n\u003ch3\u003eFord Cosworth YB Turbo Manifold - Standard or Large Primary?\u003c\/h3\u003e\n\u003cp\u003eChoose the \u003ca href=\"https:\/\/waltonmotorsport.com\/products\/ford-cosworth-yb-turbo-manifold\"\u003e\u003cstrong\u003estandard YB manifold\u003c\/strong\u003e\u003c\/a\u003e when response, broader application compatibility and compact packaging are priorities, including Mk1\/Mk2 Escort conversions.\u003c\/p\u003e\n\u003cp\u003eChoose the \u003ca href=\"https:\/\/waltonmotorsport.com\/products\/ford-cosworth-yb-turbo-manifold-large-primary\/\"\u003e\u003cstrong\u003eLarge Primary\u003c\/strong\u003e\u003c\/a\u003e when the engine's displacement, RPM, airflow and power requirements justify its \u003cstrong\u003e42.56 mm ID runners\u003c\/strong\u003e, and the vehicle installation provides the required space.\u003c\/p\u003e\n\u003cp\u003eIf you're unsure which manifold is appropriate for your YB build, \u003cstrong\u003econtact Walton Motorsport before ordering\u003c\/strong\u003e with your engine specification, turbocharger and vehicle application.\u003c\/p\u003e","brand":"Walton Motorsport","offers":[{"title":"Garrett V-Band (G25\/G30\/G35, GTX30\/GTX35) \/ 40 - 50mm Port Size (NO flange fitted)","offer_id":51588369219914,"sku":"MNYBBGV35LP-C1","price":1242.0,"currency_code":"GBP","in_stock":true},{"title":"Borg Warner EFR V-Band \/ 40 - 50mm Port Size (NO flange fitted)","offer_id":61298038014282,"sku":"MNYBBBV35LP-C1","price":1242.0,"currency_code":"GBP","in_stock":true},{"title":"Borg Warner EFR V-Band \/ 45mm Port Size (Flange Fitted)","offer_id":61298038047050,"sku":"MNYBBBV35LPFLTS45-C1","price":1314.0,"currency_code":"GBP","in_stock":true},{"title":"Borg Warner EFR V-Band \/ 50mm Port Size (Flange Fitted)","offer_id":61298038079818,"sku":"MNYBBBV35LPFLTS50-C1","price":1314.0,"currency_code":"GBP","in_stock":true},{"title":"Borg Warner EFR V-Band \/ 60mm Port Size (Flange Fitted)","offer_id":61298038112586,"sku":"MNYBBBV35LPFLTS60-C1","price":1314.0,"currency_code":"GBP","in_stock":true},{"title":"Garrett V-Band (G25\/G30\/G35, GTX30\/GTX35) \/ 45mm Port Size (Flange Fitted)","offer_id":61298038145354,"sku":"MNYBBGV35LPFLTS45-C1","price":1314.0,"currency_code":"GBP","in_stock":true},{"title":"Garrett V-Band (G25\/G30\/G35, GTX30\/GTX35) \/ 50mm Port Size (Flange Fitted)","offer_id":61298038178122,"sku":"MNYBBGV35LPFLTS50-C1","price":1314.0,"currency_code":"GBP","in_stock":true},{"title":"Garrett V-Band (G25\/G30\/G35, GTX30\/GTX35) \/ 60mm Port Size (Flange Fitted)","offer_id":61298038210890,"sku":"MNYBBGV35LPFLTS60-C1","price":1314.0,"currency_code":"GBP","in_stock":true},{"title":"Precision V-Band (T3 Frame THV Housings) \/ 40 - 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50mm Port Size (NO flange fitted)","offer_id":61298038505802,"sku":"MNYBBTV35LP-C1","price":1242.0,"currency_code":"GBP","in_stock":true},{"title":"Tial\/GBT V-Band \/ 45mm Port Size (Flange Fitted)","offer_id":61298038538570,"sku":"MNYBBTV35LPFLTS45-C1","price":1314.0,"currency_code":"GBP","in_stock":true},{"title":"Tial\/GBT V-Band \/ 50mm Port Size (Flange Fitted)","offer_id":61298038571338,"sku":"MNYBBTV35LPFLTS50-C1","price":1314.0,"currency_code":"GBP","in_stock":true},{"title":"Tial\/GBT V-Band \/ 60mm Port Size (Flange Fitted)","offer_id":61298038604106,"sku":"MNYBBTV35LPFLTS60-C1","price":1314.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/9602\/5418\/files\/MNYBBGV35LPFLTS50-C1-1_131c8c9c-9799-4a3e-a140-bc7f6c17067c.jpg?v=1755595460","url":"https:\/\/waltonmotorsport.com\/products\/ford-cosworth-yb-turbo-manifold-large-primary","provider":"Walton Motorsport","version":"1.0","type":"link"}