{"product_id":"do88-bmw-b58-gen-2-m240i-m340i-m440i-supra-intake-system","title":"do88 BMW B58 Gen 2 (M240I\/M340I\/M440I\/Supra) Intake System","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eFiltration, airflow, and heat are the key considerations when designing a new intake system for a turbocharged engine. A genuine design challenge for the B58 Gen 2 is location, the intake sits right next to the exhaust manifold, which rapidly heat soaks this position in the engine bay. High air intake temperatures are genuinely bad for engine performance, since the turbo has to build boost using hot, less dense air, making a fully sealed intake system the only way to keep IATs to a minimum. But a fully sealed system creates its own problem, a restriction from relying on only the single stock air feed at the bottom of the factory air filter box.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003edo88 identified during development that the system needed a secondary air feed to remove this restriction, and the sealed airbox includes a heat shield to minimise radiative heat transfer from the exhaust manifold. The stock intake hose is replaced with a smoother, larger carbon tube, starting at 105mm (4.1in) and tapering seamlessly to fit the turbo inlet, paired with a large custom-designed air filter using densely knitted cotton gauze for genuinely superior filtration, washable and reusable for long service life. Unlike the factory design, this system omits the OE's noise-reducing elements, allowing a more audible turbo spool and induction sound. Independent flow bench testing showed the intake system alone increases airflow by 15%, climbing to \u003cstrong\u003eup to 24%\u003c\/strong\u003e when combined with the optional do88 turbo inlet.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003ePlease select your version at checkout:\u003c\/strong\u003e without a do88 turbo inlet (compatible with the OE turbo inlet), with do88's CNC-machined turbo inlet for the OE turbo, or with do88's turbo inlet specifically matched to the Pure 800 hybrid turbo.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e \u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-2 -mb-1 text-base font-bold\"\u003eWhy Choose This Intake System\u003c\/h2\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFully sealed design with a secondary air feed, solving the restriction problem most sealed intakes create\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eHeat shield minimises radiative heat transfer from the nearby exhaust manifold\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eUp to 24% more airflow when combined with the optional turbo inlet\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSmooth 105mm carbon tube tapering to the turbo inlet, no sharp bends or restrictions\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWashable, reusable cotton gauze filter for long-term service life\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMore audible turbo spool and induction sound versus the noise-dampened factory design\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCompatible with future modifications, including turbo upgrades\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eUV and heat-resistant, high-gloss clearcoat finish\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-2 -mb-1 text-base font-bold\"\u003eCompatibility\u003c\/h2\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW G42 M240i\/M240iX (B58 Gen 2)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW G20\/G21 M340i\/M340iX (B58 Gen 2)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW G22\/G23\/G26 M440i\/M440iX (B58 Gen 2)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW G29 Z4 M40i (B58 Gen 2)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eToyota GR Supra MK5 (A90\/A91, B58 Gen 2)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"do88","offers":[{"title":"OEM (no Inlet Pipe included)","offer_id":54462618206541,"sku":"LF-240-OE","price":979.51,"currency_code":"EUR","in_stock":false},{"title":"do88 Inlet Pipe (for factory turbo)","offer_id":54462618239309,"sku":"LF-240-INL-OE","price":1261.09,"currency_code":"EUR","in_stock":false},{"title":"do88 Inlet Pipe (for Pure 800 turbo)","offer_id":54462618272077,"sku":"LF-240-INL-P800","price":1261.09,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0980\/4808\/2253\/files\/do88_BMW_B58_Gen_2_M240I_M340I_M440I_Supra_Intake_System.webp?v=1786350971","url":"https:\/\/i6tuning.com\/products\/do88-bmw-b58-gen-2-m240i-m340i-m440i-supra-intake-system","provider":"i6 Tuning","version":"1.0","type":"link"}