{"product_id":"doc-race-b58-gen2-b48-top-mount-turbo-kit-bmw-g-chassis-toyota-gr-supra","title":"DOC Race B58 Gen2 \u0026 B48 Top Mount Turbo Kit – BMW G-Chassis \/ Toyota GR Supra","description":"\u003cstyle\u003e.sl-desc h2{font-size:1.15em;letter-spacing:.06em;text-transform:uppercase;border-bottom:2px solid #111;padding-bottom:6px;margin:1.6em 0 .7em}.sl-desc h3{font-size:1em;margin:1.2em 0 .4em}.sl-desc ul{margin:0 0 1em 1.2em}.sl-desc li{margin:.25em 0}.va-table{width:100%;border-collapse:collapse;margin:.5em 0 1em;font-size:.95em}.va-table th{text-align:left;padding:10px 8px;border-bottom:2px solid #333;white-space:nowrap}.va-table td{padding:8px;border-bottom:1px solid #e5e5e5;vertical-align:top}\u003c\/style\u003e\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eDOC Race top-mount turbo kits for the G-chassis B58 Gen 2 (M340i \/ M240i), the G-chassis B48, and the 6-port GR Supra Sportsman Series. Each replaces the factory turbo with a single large-frame Precision turbo on a purpose-built top-mount manifold.\u003c\/p\u003e\n\u003cp\u003eThe B58 Gen 2 and B48 options are priced as kits less turbo — you supply your own Precision turbo. The Supra Sportsman Series option includes the turbocharger.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eB58 Gen 2 option: kit less turbo, 1.25 Schedule 40 runner, stainless tubular manifold with 1.90\" OD runners\u003c\/li\u003e\n\u003cli\u003eB48 option: kit less turbo\u003c\/li\u003e\n\u003cli\u003eSupra Sportsman Series option: 6-port B58, Precision Sportsman turbo included (6870 \/ 6875 \/ 7175 \/ 7475)\u003c\/li\u003e\n\u003cli\u003e2 x Turbosmart 45mm wastegates with external dump tubes; 3.5\" stainless downpipe\u003c\/li\u003e\n\u003cli\u003ePrecision (PTE) turbochargers only\u003c\/li\u003e\n\u003cli\u003eBuilt to order; approximately 4 weeks lead time\u003c\/li\u003e\n\u003cli\u003eTurbo-included versions of the B58 Gen 2 and B48 kits are available by special order — \u003ca href=\"\/pages\/contact-us\"\u003eContact Speed Logic\u003c\/a\u003e for pricing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eStainless tubular T4 twin-scroll manifold\u003c\/li\u003e\n\u003cli\u003e2 x Turbosmart 45mm wastegates and 2 x dump tubes\u003c\/li\u003e\n\u003cli\u003e3.5\" stainless downpipe\u003c\/li\u003e\n\u003cli\u003e2 x charge pipes (turbo to throttle body), silicone couplers and clamps\u003c\/li\u003e\n\u003cli\u003eStainless oil drain, oil feed and coolant bypass line kits\u003c\/li\u003e\n\u003cli\u003eT4 gasket, turbo studs and nuts, exhaust V-band clamp\u003c\/li\u003e\n\u003cli\u003e4\" turbo screen and heat shield\u003c\/li\u003e\n\u003cli\u003e1\/4\" nylon tubing and fittings for wastegate routing\u003c\/li\u003e\n\u003cli\u003eValve cover vent filter and 2 x 3\/4\" boost caps\u003c\/li\u003e\n\u003cli\u003ePrecision turbocharger (Supra Sportsman Series option only)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003ch3\u003eRequired Additional Parts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision turbocharger (required for B58 Gen 2 and B48 options)\u003c\/strong\u003e — not included in those prices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTuning (required):\u003c\/strong\u003e B58 — \u003ca href=\"\/products\/bootmod3-b58-bmw-fxx-gxx-m140i-m240i-340i-440i-540i-640i-740i-840i-z4m40i-m340i-x3-m40i-tune\"\u003eBootmod3 B58 Tune\u003c\/a\u003e, \u003ca href=\"\/products\/mhd-super-license-for-b58\"\u003eMHD Super License – B58\u003c\/a\u003e, \u003ca href=\"\/products\/bmw-gen1-gen2-b58-jb4\"\u003eJB4 Tuner – B58 Gen1 \u0026amp; Gen2\u003c\/a\u003e; B48 — \u003ca href=\"\/products\/bootmod3-b48-b46-bmw-fxx-gxx-120i-125i-220i-230i-320i-330i-330e-420i-430i-520i-530i-x3-x4-20i-25i-30i-tune\"\u003eBootmod3 B46\/B48 Tune\u003c\/a\u003e or \u003ca href=\"\/products\/bmw-b38-b46-b48-b58-jb4\"\u003eJB4 Tuner – B48\u003c\/a\u003e; Supra — \u003ca href=\"\/products\/bootmod3-a90-a91-toyota-supra-tune\"\u003eBootmod3 GR Supra Tune\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eECU unlock\u003c\/strong\u003e for locked B58 DMEs: \u003ca href=\"\/products\/ecu-unlock-service-for-bmw-b58-engines-including-bmw-m240i-m340i-440i-etc\"\u003eSpeed Logic ECU Unlock Service\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupporting fueling\u003c\/strong\u003e sized for your power target, e.g. \u003ca href=\"\/products\/jb4-fuel-pressure-upgrade-kit-b58-s58-b48-supra\"\u003eJB4 Fuel Pressure Upgrade Kit\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDOC Race kit video: \u003ca href=\"https:\/\/www.youtube.com\/watch?v=xcCoOk-E0N0\" target=\"_blank\" rel=\"noopener\"\u003eB58 top mount turbo kit\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eWastegate vacuum lines must be routed away from exhaust heat; melted lines can cause over- or under-boost.\u003c\/li\u003e\n\u003cli\u003eDOC Race does not list specific B48 models — confirm your model with Speed Logic before ordering.\u003c\/li\u003e\n\u003cli\u003eDOC Race does not publish an installation manual for these kits. \u003ca href=\"\/pages\/contact-us\"\u003eContact Speed Logic\u003c\/a\u003e for install support.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eVEHICLE APPLICATIONS\u003c\/h2\u003e\n\u003ctable class=\"va-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eChassis\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM340i\u003c\/td\u003e\n\u003ctd\u003eG20\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L Turbo I6 (Gen 2)\u003c\/td\u003e\n\u003ctd\u003e2020–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM340i xDrive\u003c\/td\u003e\n\u003ctd\u003eG20\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L Turbo I6 (Gen 2)\u003c\/td\u003e\n\u003ctd\u003e2020–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM240i\u003c\/td\u003e\n\u003ctd\u003eG42\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L Turbo I6 (Gen 2)\u003c\/td\u003e\n\u003ctd\u003e2022–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM240i xDrive\u003c\/td\u003e\n\u003ctd\u003eG42\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L Turbo I6 (Gen 2)\u003c\/td\u003e\n\u003ctd\u003e2022–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e330i\u003c\/td\u003e\n\u003ctd\u003eG20\u003c\/td\u003e\n\u003ctd\u003eB48 2.0L Turbo I4\u003c\/td\u003e\n\u003ctd\u003e2020–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e430i\u003c\/td\u003e\n\u003ctd\u003eG22\u003c\/td\u003e\n\u003ctd\u003eB48 2.0L Turbo I4\u003c\/td\u003e\n\u003ctd\u003e2021–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e230i\u003c\/td\u003e\n\u003ctd\u003eG42\u003c\/td\u003e\n\u003ctd\u003eB48 2.0L Turbo I4\u003c\/td\u003e\n\u003ctd\u003e2022–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eToyota\u003c\/td\u003e\n\u003ctd\u003eGR Supra 3.0\u003c\/td\u003e\n\u003ctd\u003eA90\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L Turbo I6 (6-port)\u003c\/td\u003e\n\u003ctd\u003e2021–2026\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eToyota\u003c\/td\u003e\n\u003ctd\u003eGR Supra 3.0 Premium\u003c\/td\u003e\n\u003ctd\u003eA90\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L Turbo I6 (6-port)\u003c\/td\u003e\n\u003ctd\u003e2021–2026\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"DOC Race","offers":[{"title":"B58 Gen2 M340i \/ M240i – Kit Less Turbo (1.25\" Runner)","offer_id":52563833159960,"sku":null,"price":4200.0,"currency_code":"USD","in_stock":true},{"title":"B48 G-Chassis – Kit Less Turbo","offer_id":52563833192728,"sku":null,"price":4200.0,"currency_code":"USD","in_stock":true},{"title":"Supra A90\/A91 Sportsman Series 6-Port – With Turbo","offer_id":52563833225496,"sku":null,"price":9000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2307\/8117\/files\/A0E316AE-E3D1-4173-97BE-27B11B0E2C31.jpg?v=1787621372","url":"https:\/\/speedlogicauto.com\/products\/doc-race-b58-gen2-b48-top-mount-turbo-kit-bmw-g-chassis-toyota-gr-supra","provider":"SPEED LOGIC","version":"1.0","type":"link"}