BMW 340i Heat Exchanger - Dinan - High Performance - '16-'20. A robust, direct-fit upgrade for the 2016–2020 BMW 340i (F30) that stabilizes IATs for consistent performance.

Dinan's B4x/B58 exchanger uses a 48mm core vs. the 27mm OEM unit, providing 78% more heat-transfer surface and greater thermal mass. L-shaped end tanks and 100% TIG-welded, pressure-tested construction add durability. Testing shows an average 8° IAT drop, with up to 15° over 15 successive WOT pulls, curbing heat soak and limp-mode. Hardware is included, including xDrive transmission cooler brackets. Note: minor trimming of the plastic core stack shroud may be required on cars with the OEM hot-climate exchanger; see the installation PDF.

Features

• 48mm Dinan core vs. 27mm stock
• 78% more cooling surface area and volume
• L-shaped end tanks; increased thermal mass
• Avg 8° IAT drop; up to 15° recorded
• 100% TIG welded; hardware incl. xDrive brackets

Questions? Call 512-982-9393 (TX) or 562-981-6800 (CA). We have locations in Austin, Texas and the Los Angeles, California area for installation and customization. Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov