{"product_id":"jb4-tuner-2022-subaru-wrx-ascent-legacy-xt-outback-xt-2-4l-turbo","title":"JB4 Tuner - 2022+ Subaru WRX \/ Ascent \/ Legacy XT \/ Outback XT 2.4L Turbo","description":"\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to +50 whp \/ +70 hp crank\u003c\/strong\u003e on a stock 2.4L turbo Subaru running pump gas — even more with bolt-ons and E85\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eNo ECU flash — real gains without unlocking or flagging your ECU\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJB4 PRO Bluetooth adapter \u0026amp; free app included\u003c\/strong\u003e — wireless map switching, logging, and free firmware updates\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug \u0026amp; play harness\u003c\/strong\u003e — fast install\/removal, fully reversible, not VIN-locked\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull feature set\u003c\/strong\u003e — map switching, boost-by-gear, water\/meth, data logging, fault-code read\/clear\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBillet enclosure • Designed \u0026amp; assembled in the USA • 5-year warranty\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\u003c!-- splitnew --\u003e\n\u003cstyle\u003e\n@media (max-width:680px){\n  .sf-row { display:block !important; }\n  .sf-row td { display:block !important; width:100% !important; padding:0 0 24px 0 !important; box-sizing:border-box; }\n  .sf-video-wrap { position:relative; padding-bottom:56.25%; height:0; overflow:hidden; border-radius:6px; }\n  .sf-video-wrap iframe { position:absolute; top:0; left:0; width:100%; height:100%; border:0; }\n}\n\u003c\/style\u003e\n\u003ch2 style=\"text-align: center;\"\u003eJB4 Tuner — 2022+ Subaru WRX \/ Ascent \/ Legacy XT \/ Outback XT\u003c\/h2\u003e\n\u003cp style=\"text-align: center; color: #555; margin-bottom: 32px;\"\u003eThe most advanced plug-and-play tuning system for the \u003cstrong\u003e2.4L turbo Subaru\u003c\/strong\u003e — up to \u003cstrong\u003e50 whp (70 hp crank)\u003c\/strong\u003e on a completely stock car, with no flash and no risk to your factory ECU.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center; margin-bottom: 40px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/5743\/0070\/files\/Jb4-Tune-tuner-tune-chip.jpg\" alt=\"JB4 plug-and-play tuner for Subaru WRX Ascent Legacy Outback 2.4L turbo\" style=\"max-width: 70%; width: 100%; border-radius: 6px; display: inline-block;\"\u003e\u003c\/div\u003e\n\u003ctable class=\"sf-row\" style=\"width: 100%; border-collapse: collapse; margin-bottom: 40px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 55%; vertical-align: top; padding: 0 24px 0 0;\"\u003e\n\u003ch3 style=\"margin: 0 0 12px;\"\u003eReal Power, No Flash Required\u003c\/h3\u003e\n\u003cp\u003eThe JB4 is the most advanced plug-and-play tuning system available for the Subaru 2.4L turbo platform. Power gains of up to \u003cstrong\u003e50 horsepower to the wheels (70 hp crank)\u003c\/strong\u003e are possible on a completely stock car running pump gas. Add bolt-ons, higher octane, or E85 mixtures and the gains climb even higher.\u003c\/p\u003e\n\u003cp\u003eUnlike a flash tune, the JB4 needs no staged upgrades or supporting mods — install it as your very first upgrade and immediately feel stronger acceleration, faster turbo response, and smoother power delivery. And because it never touches your ECU, you get safe, significant gains while keeping every factory safety system.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 45%; vertical-align: top; padding: 0 0 0 8px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/5743\/0070\/files\/JB4-BOX-0000_ce8fed6e-f12f-44db-89f1-6726628c8648.jpg\" alt=\"JB4 billet aluminum enclosure for Subaru WRX\" style=\"width: 100%; border-radius: 6px; display: block;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable class=\"sf-row\" style=\"width: 100%; border-collapse: collapse; margin-bottom: 40px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 45%; vertical-align: top; padding: 0 24px 0 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/5743\/0070\/files\/JB4-PRO_WIreless-device-connection-bluetooth-included_364ebb6e-5dd2-4ca0-b161-1b3656945aea.jpg\" alt=\"JB4 PRO Bluetooth wireless adapter included with Subaru WRX JB4 tuner\" style=\"width: 100%; border-radius: 6px; display: block;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 55%; vertical-align: top; padding: 0 0 0 8px;\"\u003e\n\u003ch3 style=\"margin: 0 0 12px;\"\u003eJB4 PRO Bluetooth — Included\u003c\/h3\u003e\n\u003cp\u003eThe all-new JB4 PRO adapter fits fully inside the JB4 enclosure for weather protection and a clean look, and wirelessly connects to your iOS or Android device. Record and analyze data, switch performance maps on the fly, and pull free firmware updates as BMS releases more powerful maps and new features.\u003c\/p\u003e\n\u003cp\u003eThe JB4PRO Free app adds an intuitive interface, help buttons, and advanced log-analysis tools that estimate performance and flag any tuning concerns.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"margin-bottom: 48px;\"\u003e\n\u003ch3 style=\"text-align: center; font-size: 1.2em; margin: 0 0 16px;\"\u003eAdvanced Tuning, Built In\u003c\/h3\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/5743\/0070\/files\/JB4-PRO-APP-FREE_1024x1024_36ccbe23-c0a3-4052-960c-6652120089ea.jpg\" alt=\"JB4 PRO free tuning app for Subaru WRX\" style=\"max-width: 70%; width: 100%; border-radius: 6px; display: inline-block;\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"text-align: center; margin: 0 0 8px;\"\u003eDyno Results — Stock vs. JB4\u003c\/h3\u003e\n\u003cp style=\"text-align: center; color:#777; margin: 0 0 16px; font-size:0.9em;\"\u003e2022+ Subaru WRX 2.4L turbo — factory tuning vs. JB4. Click to enlarge.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center; margin-bottom: 40px;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/5743\/0070\/files\/wrx_jb4_dyno_1024x1024_9ff04870-c712-42e6-a099-cd3467b064b9.png\" target=\"_blank\" rel=\"noopener\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/5743\/0070\/files\/wrx_jb4_dyno_1024x1024_9ff04870-c712-42e6-a099-cd3467b064b9.png\" alt=\"2022+ Subaru WRX JB4 dyno chart stock vs tuned\" style=\"max-width: 70%; width: 100%; border-radius: 6px; display: inline-block;\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003ctable class=\"sf-row\" style=\"width: 100%; border-collapse: collapse; margin-bottom: 40px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%; vertical-align: middle; padding: 0 24px 0 0;\"\u003e\n\u003cdiv class=\"sf-video-wrap\" style=\"position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; border-radius: 6px;\"\u003e\u003ciframe style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0;\" src=\"https:\/\/www.youtube.com\/embed\/5Zyg4fsoVVI\" title=\"JB4 Tuner Install for 2022+ Subaru WRX\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 50%; vertical-align: middle; padding: 0 0 0 8px;\"\u003e\n\u003ch3 style=\"margin: 0 0 12px;\"\u003eEasy Plug-and-Play Install\u003c\/h3\u003e\n\u003cp\u003eThe JB4 harness plugs into accessible engine-bay connectors — fast to install, fast to remove, and completely reversible. Watch the full WRX install, then grab the \u003ca href=\"https:\/\/www.jb4tuned.com\/instructions\/WRX_JB4_Guide.pdf\" target=\"_blank\" rel=\"noopener\"\u003eWRX install guide (PDF)\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable class=\"sf-row\" style=\"width: 100%; border-collapse: collapse; margin-bottom: 40px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 100%; vertical-align: top; padding: 0;\"\u003e\n\u003ch3 style=\"margin: 0 0 12px;\"\u003eA Decade of Proven Tuning\u003c\/h3\u003e\n\u003cp\u003eThe JB4 has been the gold standard in plug-and-play turbocharged tuning for over a decade, sold in 67+ countries. It installs between your car's sensors and the ECU and safely manipulates boost, timing, and fueling for real gains — with full CANbus integration, fuel \u0026amp; spark control, and Bluetooth logging no other piggyback can match. Not VIN-locked, so you can remove it, swap it between cars, or resell it later.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"background: #f7f7f7; border-radius: 8px; padding: 24px 28px; margin-bottom: 32px;\"\u003e\n\u003ch4 style=\"margin: 0 0 8px; font-size: 1em;\"\u003e🔧 Vehicle Fitment\u003c\/h4\u003e\n\u003cp style=\"margin: 0; color: #444; line-height: 1.6;\"\u003e2022+ Subaru WRX • 2019+ Subaru Ascent • 2020+ Subaru Legacy XT • 2020+ Subaru Outback XT — all with the 2.4L 4-cylinder turbo.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003chr style=\"margin: 40px 0; border: none; border-top: 1px solid #e0e0e0;\"\u003e\n\u003ch2 style=\"text-align: center; margin-bottom: 24px;\"\u003eFAQ\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%; vertical-align: top; padding: 0 24px 20px 0;\"\u003e\n\u003cp\u003e\u003cstrong\u003eWhich Subarus does this fit?\u003c\/strong\u003e\u003cbr\u003e2022+ WRX, 2019+ Ascent, and 2020+ Legacy XT \/ Outback XT with the 2.4L turbo.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 50%; vertical-align: top; padding: 0 0 20px 8px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need to flash my ECU?\u003c\/strong\u003e\u003cbr\u003eNo. The JB4 requires no ECU flash — real gains without unlocking or flagging your ECU.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%; vertical-align: top; padding: 0 24px 20px 0;\"\u003e\n\u003cp\u003e\u003cstrong\u003eHow much power will I gain?\u003c\/strong\u003e\u003cbr\u003eUp to 50 whp (70 hp crank) on a stock car on pump gas, with more available on higher octane, E85, or with bolt-ons.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 50%; vertical-align: top; padding: 0 0 20px 8px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it have Bluetooth?\u003c\/strong\u003e\u003cbr\u003eYes — the included JB4 PRO adapter and free app connect wirelessly for map switching, logging, and firmware updates.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%; vertical-align: top; padding: 0 24px 20px 0;\"\u003e\n\u003cp\u003e\u003cstrong\u003eWhat octane do I need?\u003c\/strong\u003e\u003cbr\u003e91 octane or better is required for the performance gains. E85 blends unlock the more aggressive maps.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 50%; vertical-align: top; padding: 0 0 20px 8px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eIs it reversible?\u003c\/strong\u003e\u003cbr\u003eCompletely. The JB4 is not VIN-locked — remove it any time, swap it between vehicles, or resell it later.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Burger Motorsports","offers":[{"title":"Default Title","offer_id":55090570232127,"sku":"SUBARU-WRX-2-4T-JB4-PRO-BT-ADAPTER","price":599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0176\/5743\/0070\/files\/Jb4-Tune-tuner-tune-chip.jpg?v=1786444526","url":"https:\/\/www.stickerfab.com\/products\/jb4-tuner-2022-subaru-wrx-ascent-legacy-xt-outback-xt-2-4l-turbo","provider":"StickerFab","version":"1.0","type":"link"}