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Vehicle Info NeededDINANPART NUMBER: 421-D780-0003
D780-0003 Dinan High Performance Heat Exchanger, 2019-2025 BMW 330i/M340i/430i/M440i
$44995
Ships on Sep 25, 2026
Lowest Price GuaranteeDinan High Performance Heat Exchanger2019-2025 BMW 330i/M340i/430i/M440i
Dinan 421-D780-0003 Features:
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 that improves the overall thermal management system so everything runs cooler and more efficiently while being budget friendly.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!- Average of 8.7º C reduction in charge air temps with a maximum reduction of nearly 12º C 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
Part TypeSupercharger Heat Exchanger
BrandDINAN
Package Height4.0
Package Width22.0
Package Length30.0
Weight31.0 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part NumberD780-0003
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
