{"product_id":"kyostar-heat-exchanger-upgrade-bmw-g-series-b48-b58-m340i-m440i-330i","title":"KYOSTAR Heat Exchanger Upgrade — BMW G-Series B48\/B58 (M340i\/M440i\/330i)","description":"\u003cp\u003eHeat is the enemy of boost. The B58 runs a water-to-air charge cooling circuit, and the factory heat exchanger is the bottleneck — intake temps climb, timing pulls, power fades on back-to-back pulls. KYOSTAR's upgraded heat exchanger (NA-HE-1005-SM-BK) fixes the weak link with a larger, more efficient aluminum core built specifically for the B58 Gen2.\u003c\/p\u003e\u003cp\u003eAll-aluminum construction for durability and heat dissipation, engineered as a direct-fit upgrade for BMW G-series cars running the B48\/B58. 1-year warranty from KYOSTAR (Guangzhou Kosda) — a 12-year manufacturer, TUV Rheinland verified, with over $730K in online revenue and a 30% reorder rate. OE reference 101401000Q.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e BMW G-Series with B48\/B58 engines — M340i, M440i, 330i and related G-chassis models. Confirm your year, model, engine (B48 vs B58) and VIN with the seller before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSafety:\u003c\/strong\u003e Professional installation recommended. The cooling system must be properly bled of air after install — trapped air causes overheating. Allow the engine to cool fully before working on the cooling circuit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFactory-direct from China:\u003c\/strong\u003e Made in China and sourced straight from the vetted factory — no middleman markup. Ships from our factory partner with tracking provided. Delivery times vary by destination.\u003c\/p\u003e","brand":"StealthTorque","offers":[{"title":"Default Title","offer_id":52224333021479,"sku":"ST-CLG-001","price":509.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1008\/8533\/2263\/files\/H1c58dc1ea20a4a2e9ff643c42221d41bn.jpg_960x960q80.jpg?v=1791089745","url":"https:\/\/stealthtorque.store\/products\/kyostar-heat-exchanger-upgrade-bmw-g-series-b48-b58-m340i-m440i-330i","provider":"StealthTorque","version":"1.0","type":"link"}