CSF BMW B58/B48 Front Mount Triple-Pass Heat Exchanger w/Rock Guard - Black

19 In stock
$649.00 $599.00

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This is a high-performance front heat exchanger in black for the B46, B48, and B58 engines found in 2016-2020 F22 230i/M240i, F30 330i/340i, and F32 430i/440i models. The heat exchanger sits in front of the main radiator and is used exclusively for the water: air intercooler in the intake manifold.

This heat exchanger uses CSF's Triple-Pass flow layout to give three times the surface area for cooling than the standard heat exchanger (which BMW calls a radiator). Instead of one pass through the radiator core, coolant now makes three passes with cooling air flowing around it. CSF's exclusive B-Tube design is also used for an even greater surface area than a standard tube. The Triple-Pass layout kept intake air temps stable while the stock heat exchanger caused temps to rise 15% in testing.

The CSF B46/B58 heat exchanger is a direct drop-in upgrade for the stock cooler, even with the original auto transmission cooler in the front. The entire radiator is aluminum, even the end tanks. All of the factory hoses and mounts are re-used, and no modification is needed. The CSF even comes with its rock guard, just like the factory piece. All connections are CNC machined, and TIG welded.

All CSF radiators receive design and development in the USA with an additional wind tunnel, vibration, thermal cycle, burst pressure, and salt spray testing at their production facilities in Southeast Asia. During manufacturing, radiators are individually tested for leaks and receive a 30-point inspection before shipping. CSF is an OE supplier to several manufacturers as well as providing private-label products for other radiator brands. CSF radiators have a two-year warranty.

This Part Fits:


Year Make Model Submodel
2017-2018 BMW 230i Base
2014-2018 BMW 320i Base
2016,2018 BMW 330e Base
2017 BMW 330e iPerformance
2017-2018 BMW 330i Base
2016-2018 BMW 340i Base
2017-2018 BMW 340i GT xDrive Base
2017-2018 BMW 430i Base
2017-2018 BMW 440i Base
2017-2018 BMW 440i Gran Coupe Base
2017-2018 BMW M240i Base

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