{"product_id":"gsc-p-d-nissan-vr38dett-21-4n-chrome-polished-intake-valve-37-15mm-head-std-set-12","title":"GSC P-D Nissan VR38DETT 21-4N Chrome Polished Intake Valve - 37.15mm Head (STD) - SET 12","description":"\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eGSC Power-Division Intake Valves — Nissan VR38DETT, 37.15mm STD, 21-4N Chrome Polished (2050-12)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eA direct factory replacement intake valve set for the GT-R's VR38, in 21-4N stainless with a chrome polished finish.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eGSC set out to create the best performance, longest lasting valves available to the aftermarket. Using advanced 3D design and simulation software they built a stronger, higher flowing valve head, then flow tested prototype heads in the specific application. \u003cstrong\u003eWith the materials used, there's less valve distortion at the face than any of the tested designs\u003c\/strong\u003e — and less distortion means better sealing under extreme conditions and more consistent performance through the life of the valve.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eThree design details worth knowing:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eSwirl polished heads\u003c\/strong\u003e for smoother airflow over the valve.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eBack cut to reduce valve weight\u003c\/strong\u003e, which allows higher RPM, higher boost pressure, and more aggressive cam profiles without increasing valve spring seat pressures. That last part matters — lighter valves let you run a bigger cam on the same spring package.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eTip lengths adjusted\u003c\/strong\u003e so the application requires less tipping of the valve, maintaining proper valvetrain geometry and cutting install time when setting lash. The keeper groove is also adjusted to balance intake and exhaust spring pressures, which reduces shim use and gets the most out of GSC's spring and retainer kits.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eWorks with OEM keepers or GSC's upgraded locks.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eSpecs:\u003c\/strong\u003e 37.15mm head, standard size, 21-4N stainless, chrome polished. Set of 12 — one full intake side.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e Nissan GT-R R35, VR38DETT.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eImportant if the head is getting a valve job:\u003c\/strong\u003e this is the direct replacement length. If the head is being cut, use the \"Short\" version (2056-12) instead — the protrusion is shortened by .15mm specifically to reduce the need to tip the valves afterward. Ordering the wrong one means machine work you didn't budget for.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eExhaust valves are a separate part number.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Street Strip Supply","offers":[{"title":"Default Title","offer_id":47317239824557,"sku":null,"price":290.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/8105\/7197\/files\/gsc2050-12.jpg?v=1787706904","url":"https:\/\/streetstripsupply.com\/products\/gsc-p-d-nissan-vr38dett-21-4n-chrome-polished-intake-valve-37-15mm-head-std-set-12","provider":"Street Strip Supply","version":"1.0","type":"link"}