{"product_id":"kinugawa-turbo-big-head-adjustable-internal-wastegate-actuator-single-dual-port-2-in-1-integrated-spring","title":"Kinugawa Turbo Big Head Adjustable Internal Wastegate Actuator — Single \u0026 Dual Port, 2-in-1 Integrated Spring","description":"\u003ch2\u003eKinugawa Big Head Adjustable Internal Wastegate Actuator — Single \u0026amp; Dual Port, 2-in-1 Integrated Spring\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eKinugawa Big Head Adjustable Wastegate Actuator\u003c\/strong\u003e is a direct-fit, bolt-on upgrade engineered to solve one of the most common boost control failures in turbocharged engines: premature wastegate opening under high boost. The factory actuator's weak diaphragm spring allows the wastegate to blow open before target boost is reached, robbing mid-range torque and limiting peak power. Kinugawa's enlarged diaphragm head and precision-wound integrated spring hold the wastegate closed longer — delivering quicker spool, sharper throttle response, and sustained peak boost.\u003c\/p\u003e\n\n\u003cp\u003eAvailable in boost pressure ratings from \u003cstrong\u003e3 PSI to 26 PSI\u003c\/strong\u003e, this actuator features a \u003cstrong\u003e2-in-1 integrated spring design\u003c\/strong\u003e that makes it compatible with both single-port and dual-port wastegate configurations without modification.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Upgrade to the Kinugawa Big Head Actuator?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eEnlarged diaphragm area increases spring pressure and wastegate hold force\u003c\/li\u003e\n  \u003cli\u003eKeeps the wastegate valve seated longer for higher peak boost achieved sooner\u003c\/li\u003e\n  \u003cli\u003eProduces strong torque from idle through the entire RPM range\u003c\/li\u003e\n  \u003cli\u003eCrisp, controlled boost response — eliminates boost creep and mid-range sag\u003c\/li\u003e\n  \u003cli\u003e2-in-1 integrated spring: single and dual port exchangeable in one unit\u003c\/li\u003e\n  \u003cli\u003eAdjustable rod length with 2mm preload for precise installation fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSingle Port vs. Dual Port — What's the Difference?\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eSingle Port Actuators\u003c\/strong\u003e\u003cbr\u003e\nBoost reference is supplied to one side of the diaphragm. The wastegate opens in one direction; spring pressure alone handles the return stroke and holds the wastegate closed. Best suited for basic boost control via a manual boost controller (MBC) or electronic boost controller (EBC). Simple plumbing, straightforward setup — ideal for street and mild performance builds.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDual Port Actuators\u003c\/strong\u003e\u003cbr\u003e\nBoost reference is supplied to both sides of the diaphragm, enabling bidirectional control of the wastegate — both opening and closing. Spring pressure is pneumatically assisted on the return stroke, allowing a softer spring to achieve the same or higher boost targets with greater precision. Recommended for high-boost applications, high exhaust backpressure environments, or oversized wastegates. Best used with an EBC for maximum tunability.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eTech Tip: Dual port actuators can also be run as a traditional single port — simply leave the lower actuator port vented to atmosphere. This makes the Kinugawa 2-in-1 design a future-proof choice for any build.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eIntegrated Spring Pressure Reference\u003c\/h3\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2614\/6270\/files\/Big_Head_Actuator_Spring_Table_b6c9b2a0-9201-4655-a9f3-5d0003bb8296.png?v=1726126874\" alt=\"Kinugawa Big Head Actuator Spring Pressure Table — 2-in-1 Integrated Spring Ratings\"\u003e\n\u003cp\u003eSpring configurations: 3 PSI inner \/ 7 PSI inner \/ 7 PSI middle \/ 11 PSI middle \/ 10 PSI outer \/ 7 PSI outer. Select your target boost pressure from the variant selector above.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for internal wastegate turbochargers\u003c\/li\u003e\n  \u003cli\u003eApply \u003cstrong\u003e2mm of preload\u003c\/strong\u003e to the actuator rod during installation\u003c\/li\u003e\n  \u003cli\u003eFor clevis-type applications: set 2mm preload on the wastegate valve arm, then verify with compressed air at a pressure slightly above the actuator's rated spring pressure\u003c\/li\u003e\n  \u003cli\u003eSpring surface paint is used for color identification only — it does not affect spring function or performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKit Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Kinugawa Big Head Dual-Port Adjustable Wastegate Actuator Head\u003c\/li\u003e\n  \u003cli\u003e1 × Installation Instruction Sheet (\u003ca href=\"https:\/\/drive.google.com\/file\/d\/1rVV7tcs8WNH0PDMZy3HIugON3yWKv1-X\/view?usp=drive_link\" title=\"Kinugawa Big Head Actuator Installation Instructions\"\u003edownload PDF\u003c\/a\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Kinugawa Turbo Systems\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand New\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePort Type:\u003c\/strong\u003e Single \u0026amp; Dual Port (2-in-1 Integrated)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBoost Pressure Range:\u003c\/strong\u003e 3 PSI – 26 PSI (select variant)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Taiwan\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHS Code:\u003c\/strong\u003e 841191\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\n\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/ivJ1XsYwvJM?start=26\" title=\"Kinugawa Big Head Wastegate Actuator — Installation \u0026amp; Overview\" frameborder=\"0\" allowfullscreen\u003e\u003c\/iframe\u003e\n\u003c\/p\u003e","brand":"KINUGAWA","offers":[{"title":"3 PSI","offer_id":45796558897406,"sku":"409-09057-008","price":179.0,"currency_code":"USD","in_stock":true},{"title":"5 PSI","offer_id":45796558930174,"sku":"409-09057-009","price":179.0,"currency_code":"USD","in_stock":true},{"title":"7 PSI","offer_id":45796558962942,"sku":"409-09057-002","price":179.0,"currency_code":"USD","in_stock":true},{"title":"10 PSI","offer_id":45796558995710,"sku":"409-09057-001","price":179.0,"currency_code":"USD","in_stock":true},{"title":"11 PSI","offer_id":45796559028478,"sku":"309-13057-005","price":179.0,"currency_code":"USD","in_stock":true},{"title":"12 PSI","offer_id":45796559061246,"sku":"409-09057-007","price":179.0,"currency_code":"USD","in_stock":true},{"title":"13 PSI","offer_id":45796559094014,"sku":"409-09057-010","price":179.0,"currency_code":"USD","in_stock":true},{"title":"14 PSI","offer_id":45796559126782,"sku":"409-09057-011","price":179.0,"currency_code":"USD","in_stock":true},{"title":"15 PSI","offer_id":45796559159550,"sku":"409-09057-003","price":179.0,"currency_code":"USD","in_stock":true},{"title":"16 PSI","offer_id":45796559192318,"sku":"409-09057-012","price":179.0,"currency_code":"USD","in_stock":true},{"title":"17 PSI","offer_id":45796559225086,"sku":"409-09057-004","price":179.0,"currency_code":"USD","in_stock":true},{"title":"19 PSI","offer_id":45796559257854,"sku":"409-09057-013","price":179.0,"currency_code":"USD","in_stock":true},{"title":"20 PSI","offer_id":45796559290622,"sku":"409-09057-014","price":179.0,"currency_code":"USD","in_stock":true},{"title":"21 PSI","offer_id":45796559323390,"sku":"409-09057-015","price":179.0,"currency_code":"USD","in_stock":true},{"title":"22 PSI","offer_id":45796559356158,"sku":"409-09057-016","price":179.0,"currency_code":"USD","in_stock":true},{"title":"23 PSI","offer_id":45796559388926,"sku":"409-09057-017","price":179.0,"currency_code":"USD","in_stock":true},{"title":"24 PSI","offer_id":45796559421694,"sku":"409-09057-018","price":179.0,"currency_code":"USD","in_stock":true},{"title":"26 PSI","offer_id":45796559454462,"sku":"409-09057-006","price":179.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2614\/6270\/files\/kinugawa-turbo-big-head-adjustable-internal-wastegate-actuator-single-dual-port-2-in-1-integrated-spring-35895939629310.jpg?v=1776648215","url":"https:\/\/store.kinugawaturbosystems.com\/products\/kinugawa-turbo-big-head-adjustable-internal-wastegate-actuator-single-dual-port-2-in-1-integrated-spring","provider":"Kinugawa Turbo Systems","version":"1.0","type":"link"}