Product description
Upgrade the performance of your B58 Gen 2 engine with the JQmod Performance Auxiliary radiators!
The B58 Engine Cooling System
The B58 engine is equipped with a three-front radiator cooling setup, consisting of one large central main radiator and two compact auxiliary radiators positioned ahead of each wheel well. Modified and performance-tuned B58 engines generate substantially higher thermal load, making it difficult to sustain stable optimal operating temperatures during aggressive street driving, track days, or drag racing scenarios. Factory OEM auxiliary radiators feature thin cooling cores and fragile plastic end tanks, which cannot meet the heat dissipation demands of upgraded tuned vehicles. Replacing the stock auxiliary radiators with our upgraded units effectively stabilizes engine temperatures and prevents overheating under high-load conditions.
Our Solution
The factory mounting area for the B58 auxiliary radiators reserves ample upgrade space, allowing us to expand both the frontal cooling surface area and core thickness for left and right side radiators. The stock factory radiators are symmetrical on both sides, and JQmod Performance Auxiliary Radiators are engineered as direct drop-in replacements for both left and right positions. We supply the radiators as a matched pair, as single-side replacement cannot deliver full cooling performance gains. Our upgraded auxiliary radiators greatly enhance overall cooling capacity and eliminate heat soak issues during continuous high-load operation.
Key features:
Significantly enlarged core volume compared to original OEM radiators
Heavy-duty dual-row core with a 40mm overall thickness
Full aluminum construction with premium durable TIG-welded end tanks for long-term reliability
Elevated coolant fluid capacity for superior and consistent heat dissipation efficiency
Installation
Designed for hassle-free direct installation, our auxiliary radiators come with precision CNC-machined mounting brackets and factory-style quick-connect inlet and outlet ports for perfect OEM-style fitment. The original factory rock guard can be seamlessly reinstalled onto our upgraded radiators, providing effective protection against road debris and stone impacts.
Fits model
Toyota GR Supra MK5 (A90)Engine: B58Model years: 2020 -
BMW 2' M240i M240iX (G42)Engine: B58Model years: 2022 -Miscellaneous: Only suitable for cars with a remote radiator (17118672237) on the right side from factory. This is included in the M Technology Package with option code: 33T
BMW 3' M340i M340iX (G20 G21)Engine: B58Model years: 2018 -Miscellaneous: Only suitable for cars with a remote radiator (17118672237) on the right side from factory. This is included in the M Technology Package with option code: 33T
BMW 4' M440i M440iX (G22 G23 G26)Engine: B58Model years: 2021 -Miscellaneous: Only suitable for cars with a remote radiator (17118672237) on the right side from factory. This is included in the M Technology Package with option code: 33T
BMW Z4 M40i (G29)Engine: B58Model years: 2017 -Miscellaneous: Only suitable for cars with a remote radiator (17118672237) on the right side from factory. This is included in the M Technology Package with option code: 33T