{"product_id":"gsc-p-d-nissan-vr38dett-conical-valve-spring-kit-w-tvs1903-conical-spring","title":"GSC P-D Nissan VR38DETT Conical Valve Spring Kit w\/ TVS1903 Conical Spring","description":"\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eGSC Power-Division Conical Valve Spring Kit with Titanium Retainers — Nissan VR38DETT (5068)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eA conical spring package for the GT-R's VR38, built around the TVS1903 conical spring.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eConical springs are the front runners in valvetrain harmonic stability\u003c\/strong\u003e, and that's the whole reason to spec them. The coil diameter tapers, which drops the spring's own mass and shifts its natural frequency away from the harmonics that cause surge. Less reciprocating mass and better resistance to resonance means the valvetrain stays controlled at RPM where a conventional round-wire spring starts to float — and float is what puts a valve into a piston.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe tapered geometry also lets the coils nest as they compress, so you get more usable lift before coil bind.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eTitanium retainers\u003c\/strong\u003e cut reciprocating mass further and reduce the load the spring has to control. GSC machines them CNC with tolerances and repeatability that keep seat pressure consistent across every valve in the head — uneven seat pressure across 24 valves is how one cylinder floats before the others.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eGSC develops valvetrain components using advanced design and flow simulation software backed by real-world testing, and springs are nano peened and batched by seat pressure so the set is matched rather than assorted.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eIncludes 24 titanium retainers, 24 conical valve springs, and 24 valve spring shims\u003c\/strong\u003e — a full head's worth for the V6.\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\u003eDo this while the heads are off.\u003c\/strong\u003e Springs and retainers are a head-apart job — if you're already in for cams or a valve job, that's the time.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eVerify your cam profile before ordering.\u003c\/strong\u003e A spring that doesn't suit the lobe either floats or coil binds, and both end the engine.\u003c\/p\u003e","brand":"Street Strip Supply","offers":[{"title":"Default Title","offer_id":47317222850733,"sku":null,"price":843.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/8105\/7197\/files\/gsc5068.jpg?v=1787706299","url":"https:\/\/streetstripsupply.com\/products\/gsc-p-d-nissan-vr38dett-conical-valve-spring-kit-w-tvs1903-conical-spring","provider":"Street Strip Supply","version":"1.0","type":"link"}