Product details

The Dinan B4x/B58 heat exchanger for the F2x/F3x chassis assists in mitigating these issues with a more robust core (48mm thick Dinan core vs. 27mm thick OEM core) that wields 78% more heat transfer surface area for improved cooling capacity. The significant increase in core thickness requires unique "L" shaped end tanks to be incorporated as well, which also contributes to the overall thermal mass (ability to absorb, store, and release heat) improvement beyond the OEM setup. With up to a 15&deg IAT delta recorded over stock the Dinan heat exchanger is ready, and able, to assist in extending your vehicles ability to deliver maximum performance time and time again for your driving enjoyment! The factory B4x/B58 heat exchanger is not built to cater to the rigorous demands often associated with a modified build. The thin core is easily overwhelmed with IAT's rising dramatically once pushed beyond a few successive WOT pulls or even a few minutes at the track. This elevation in temperature gives way to the factory ECU fail safes pulling timing and reducing overall power in order to keep the system from overheating to the point of permanent damage. On an application where enjoyment is directly attributed to pushing the platform to its limits this constraint to cooling presents a challenge for the automotive enthusiast. Dinan High Performance Heat Exchanger - 2016-2020 BMW 330i/340i/430i/440i Dinan High Performance Heat Exchanger - 2017-2021 BMW 230i/M240i F22/F23/F30/F31/F32/F33/F34/F36

Manufacturer fitment & guides

Check D780-0002 against the manufacturer’s application information below.

• Installation Instructions ↗

Part-specific notes

• Not CARB approved. Destination and intended-use restrictions must be checked before sale.
• California Proposition 65: Y

Manufacturer documents

• Installation Instructions