{"product_id":"gsc-p-d-nissan-rb26dett-30-15mm-head-std-101-74mm-long-exhaust-valve-set-of-12","title":"GSC P-D Nissan RB26DETT 30.15mm Head STD 101.74mm Long Exhaust Valve - Set of 12","description":"\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eGSC Power-Division Exhaust Valves — Nissan RB26DETT, 30.15mm Head, Standard (2143-12)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe exhaust-side companion set for the RB26. GSC develops their valvetrain components using advanced design and flow simulation software backed by real-world performance testing, which is why these show up in built RB heads rather than factory valves.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eSpecs:\u003c\/strong\u003e 30.15mm head diameter, 101.74mm overall length, standard stem size. Set of 12 — one full exhaust side for an RB26.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eStandard stem and OEM dimensions\u003c\/strong\u003e mean this drops into a stock or freshened head with no guide work and no retainer or spring changes required.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eExhaust valves live the harder life.\u003c\/strong\u003e They sit in combustion gas on the way out with far less cooling than the intake side, and on a boosted RB26 running high exhaust gas temperatures that's where valve failure starts. On any engine that's seen serious boost or a lot of heat cycles, replacing the exhaust side is the higher priority of the two.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003ePair with matched springs and retainers.\u003c\/strong\u003e A valve is one piece of a system — if the build is running aggressive cams or high RPM, the spring package needs to suit.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eVerify against your head before ordering.\u003c\/strong\u003e Confirm current valve length and head diameter, especially if the head has been machined or has aftermarket seats. Oversize (+1mm) and +1.5mm tip versions exist under separate part numbers if the head has already been cut.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eIntake valves are a separate part number\u003c\/strong\u003e — most builds replace both sides at once.\u003c\/p\u003e","brand":"Street Strip Supply","offers":[{"title":"Default Title","offer_id":47282928844973,"sku":null,"price":516.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/8105\/7197\/files\/gsc2142-12_ac2a8685-43a2-4693-90b8-71f28cae14ee.jpg?v=1787268446","url":"https:\/\/streetstripsupply.com\/products\/gsc-p-d-nissan-rb26dett-30-15mm-head-std-101-74mm-long-exhaust-valve-set-of-12","provider":"Street Strip Supply","version":"1.0","type":"link"}