{"product_id":"verify-p-n-empi-gtv-2-stage-1-cnc-wedge-ported-heads-94mm-40-35-5mm-ss-valves-dual-spring-pair","title":"EMPI GTV-2 Stage 1 CNC Wedge Ported Heads | VW Type 1 94mm | 40\/35.5mm SS Valves, Pair (98-1431-B)","description":"\u003ch2\u003e\u003cb\u003eEMPI GTV-2 Stage 1 CNC Wedge Ported Heads — 94mm, 40\/35.5mm SS Valves, Pair (98-1431-B)\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eCNC-ported heads take the guesswork out of porting — every port cut the same, ready to bolt on. EMPI's GTV-2 Stage 1 wedge-port heads (98-1431-B) are machined on a \u003cb\u003e5-axis CNC mill\u003c\/b\u003e for \u003cb\u003e94mm bore\u003c\/b\u003e, with \u003cb\u003e40×35.5mm stainless Manley valves\u003c\/b\u003e and \u003cb\u003edual hi-rev springs\u003c\/b\u003e.\u003c\/p\u003e\n\u003cp\u003eStage 1 is the street\/strip starting point in the CNC range, well-suited to 1914–2110cc builds. \u003cb\u003eSold as a matched pair.\u003c\/b\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eVehicle Fitment\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eVW Beetle:\u003c\/b\u003e 1971-1979\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVW Bus:\u003c\/b\u003e 1971-1979\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVW Karmann Ghia:\u003c\/b\u003e 1971-1974\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVW Type 3:\u003c\/b\u003e 1971-1973\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVW Thing:\u003c\/b\u003e 1973-1975\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eConfirmed:\u003c\/b\u003e VW Type 1 dual-port big-bore builds running 94mm bore — 1914cc, 2110cc, 2276cc. \u003cb\u003eNot confirmed:\u003c\/b\u003e stock 85.5mm or 90.5\/92mm bore (use the matching-bore CNC head), single-port engines, Type 4 engines.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eWhy Choose EMPI?\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eEMPI's GTV-2 CNC heads are cut on a 5-axis mill for consistent, repeatable porting.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eKey Features \u0026amp; Benefits\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cb\u003e94mm bore, GTV-2 dual port casting.\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStage 1 wedge-port CNC machining:\u003c\/b\u003e cut on a 5-axis CNC mill.\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003e40mm intake \/ 35.5mm exhaust stainless Manley valves.\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eDual hi-rev valve springs.\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eChromoly retainers and hardened keepers.\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eBronze valve guides.\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eCustom intake gasket included.\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003e12mm 3\/4\" reach spark plug holes.\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eRocker, exhaust, and intake studs included.\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003ePerformance 3-angle valve job.\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eSold as a matched pair.\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eValves:\u003c\/b\u003e 40mm intake \/ 35.5mm exhaust, stainless Manley\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSprings:\u003c\/b\u003e dual hi-rev\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePort:\u003c\/b\u003e Stage 1 CNC wedge\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSpark plugs:\u003c\/b\u003e 12mm 3\/4\" reach\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePart Number:\u003c\/b\u003e 98-1431-B | UPC: 707924443844\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSold as:\u003c\/b\u003e matched pair\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eWhat does CNC porting get me?\u003c\/b\u003e Consistent, repeatable port work cut on a 5-axis mill — ready to bolt on, no hand porting needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWhat bore are these for?\u003c\/b\u003e 94mm pistons (1914-2276cc).\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHow does Stage 1 compare to Stage 3?\u003c\/b\u003e Stage 1 is the street\/strip port; Stage 3 has larger valves and a more aggressive wedge port for maximum flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSold each or as a pair?\u003c\/b\u003e Matched pair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWhat's the part number?\u003c\/b\u003e EMPI 98-1431-B (UPC 707924443844).\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAre you an authorized dealer?\u003c\/b\u003e Yes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eInstallation\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eLash caps (P\/N 00-4006-0) are required for all stainless steel valve applications — sold separately. 12mm long-reach spark plugs must be used in place of stock Bosch plugs. Verify rocker arm geometry and check for coil bind with dual springs.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cb\u003eExplore Related Categories\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/engine-parts\"\u003eEngine Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/all-vw-aircooled\"\u003eAll VW Air-Cooled\u003c\/a\u003e · \u003ca href=\"\/collections\/vw-beetle\"\u003eVW Beetle\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eProp 65 Warning\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eWARNING: This product can expose you to chemicals including lead which are known to the State of California to cause cancer and reproductive harm. For more information, go to www.P65Warnings.ca.gov. All parts legal for use on pre-pollution controlled vehicles only.\u003c\/p\u003e","brand":"EMPI","offers":[{"title":"Default Title","offer_id":44924462104691,"sku":"98-1431-B","price":1863.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2760\/1523\/files\/98-1431-B_Pair-scaled.jpg?v=1778012059","url":"https:\/\/www.washburnsmetal.com\/products\/verify-p-n-empi-gtv-2-stage-1-cnc-wedge-ported-heads-94mm-40-35-5mm-ss-valves-dual-spring-pair","provider":"Washburn's Metal","version":"1.0","type":"link"}