NEW PRODUCT RELEASE: Dinan BMW G2x/G4x and Toyota A9x GR Supra Heat Exchanger


NEW PRODUCT RELEASE: Dinan BMW G2x/G4x and Toyota A9x GR Supra Heat Exchanger


OPELIKA, AL. (January 31st, 2024) - Dinan is pleased to be able to announce a new product offering being added into the catalog; the Dinan Heat Exchanger for the G2x/G4x BMW as well as the A9x Toyota A9x GR Supra. Experience the Dinan difference today and never look back!

Part Number(s): D780-0003


  • 2022-2024 BMW G42 M240i
  • 2019-2024 BMW G20 M340i
  • 2021-2024 BMW G22/G23/G26 M440i
  • 2020-2024 BMW G29 Z4 M40i
  • 2022-2024 BMW G42 230i
  • 2019-2024 BMW G20 330i
  • 2021-2024 BMW G22/G23/G26 430i
  • 2019-2024 BMW G29 Z4 30i
  • 2020-2024 Toyota GR Supra (3.0T)
  • 2021-2024 Toyota GR Supra (2.0T)

The Quick and Dirty (Features and Benefits):

  • Average of 8.7º reduction in charge air temps with a maximum reduction of nearly 12º over 30 successive WOT pulls
  • General improvement to the efficiency of the thermal management system, inclusive of engine cooling
  • 45mm thick Dinan core vs. 26.75mm thick stock cooler core
  • 68% more cooling surface area and volume than stock
  • Reduces the tendency to heat soak / go in to limp mode
  • Durable bar and plate design that is less susceptible to damage from road debris
  • Pressure tested, 100% TIG welded, Aluminum construction
  • Direct fit replacement with no modifications required

The Story:

The OE thermal management system for the B4x/B58 G-chassis BMW and Toyota GR Supra offers an improved formula from prior generations. With a setup where engine coolant is also re-routed through the heat exchanger, the system effectively assists in overall engine cooling as well as charge cooling. However, like its predecessors, it has room for improvement as it can be overwhelmed when the system is taxed aggressively or as power levels are increased. Once overburdened, this results in the undesirable outcome of power being diminished. Avoidance of this unwelcome scenario can be attained though with a Dinan heat exchanger! Improving the overall thermal management system so everything runs cooler and more efficiently while being budget friendly has never been easier.

The Dinan B4x/B58 heat exchanger for the BMW G2x/G4x and Toyota A9x Supra assists in improving overall charge cooling using a more robust core (45mm thick Dinan core vs. 26.75mm thick OEM core) that wields 68% more heat transfer surface area for improved cooling capacity. The significant increase in core thickness and full-size end tanks contribute to the overall thermal mass (ability to absorb, store, and release heat) improvement beyond the OEM setup. With up to a nearly 12º reduction in charge air temps 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!


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