{"product_id":"csf-hx-b58-b48-fchassis","title":"CSF Triple-Pass Heat Exchanger — B58 \/ B48 (F2x \/ F3x BMW)","description":"\u003cp\u003e\u003cstrong\u003eCSF Triple-Pass heat exchanger for F2x\/F3x B58 and B48 — the radiator side of the charge-cooling loop.\u003c\/strong\u003e On these F-chassis cars the intake charge is cooled by a coolant circuit; this front exchanger cools the coolant that feeds the manifold's charge cooler. The factory unit is a single-row, ~27mm single-pass core that saturates under sustained load.\u003c\/p\u003e\n\u003ch3\u003eWhat CSF changes\u003c\/h3\u003e\n\u003cp\u003eA 68mm 2-row core — CSF calls it the largest 2-row they build — run as a triple-pass design, so the coolant crosses the core three times before returning to the manifold (the OEM unit and most aftermarket designs are single-pass). All-aluminum with B-Tube geometry, a detachable rock guard, and CNC quick-connect fittings. Installs with no modifications.\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\u003eBMW F2x\/F3x — 230i (B48), 330i \/ 330e (B48), 340i (B58), 430i (B48), 440i (B58), and M240i (B58), 2016–2021. BMW applications only. Confirm your chassis in the selector.\u003c\/p\u003e\n\u003cp\u003eThis is the heat-exchanger-side core of a B58\/B48 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":43280714989629,"sku":"CSF 8131","price":985.0,"currency_code":"USD","in_stock":true},{"title":"Raw","offer_id":43280715022397,"sku":"CSF 8131","price":785.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":43280715055165,"sku":"CSF 8131B","price":785.0,"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.jpg?v=1781742887","url":"https:\/\/essewerks.com\/products\/csf-hx-b58-b48-fchassis","provider":"Esse Werks","version":"1.0","type":"link"}