{"product_id":"csf-hx-b58","title":"CSF High-Performance Heat Exchanger — B58 (G2x \/ G4x \/ Z4)","description":"\u003cp\u003e\u003cstrong\u003eCSF front-mount heat exchanger for the Gen-2 B58 — the radiator side of the water-to-air charge-cooling system.\u003c\/strong\u003e On these cars the intake charge is cooled by a coolant loop, and this front exchanger is what pulls heat back out of that coolant. The factory unit is a single-row, ~25mm core; once boost goes up it can't shed heat fast enough and intake temps climb pull after pull.\u003c\/p\u003e\n\u003ch3\u003eWhat CSF changes\u003c\/h3\u003e\n\u003cp\u003eA 2-row, 42mm core using CSF's B-Tube internal geometry — far more cooling capacity than the OEM single-row piece. All-aluminum and TIG-welded, with an included rock guard and OEM transmission-cooler mounting points built in. Drop-in fit using the factory locations and quick-connect lines.\u003c\/p\u003e\n\u003ch3\u003eFinishes\u003c\/h3\u003e\n\u003cp\u003eWe spec these with a \u003cstrong\u003eThermal Heat Dispersion coating by default\u003c\/strong\u003e — an emissivity coating that helps the core radiate heat away, which is exactly what you want on a cooler. Prefer to skip it? Raw or Black are available for less. Choose above.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eGen-2 B58 — G20\/G21 330i \u0026amp; M340i, G22\/G23\/G26 430i \u0026amp; M440i, G42 M240i, and G29 Z4. Confirm your chassis in the selector.\u003c\/p\u003e\n\u003cp\u003eThis is the heat-exchanger-side core of a B58 Stage 2 build. The \u003ca href=\"\/products\/stage-2-kit-b58\"\u003eStage 2 Kit — B58\u003c\/a\u003e packages the matched parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"CSF","offers":[{"title":"Thermal Heat Dispersion","offer_id":43280696999997,"sku":"CSF 8154","price":1105.0,"currency_code":"USD","in_stock":true},{"title":"Raw","offer_id":43280697032765,"sku":"CSF 8154","price":905.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":43280697065533,"sku":"CSF 8154","price":905.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/csf-f3x-f2x-b58-b48-triple-pass-02.webp?v=1781742886","url":"https:\/\/essewerks.com\/products\/csf-hx-b58","provider":"Esse Werks","version":"1.0","type":"link"}