CSF F-Series High-Performance Heat Exchanger (B48, B58) - F2x, F3x

The BMW B58 motor has already proven to be an impressive performance platform capable of making impressive power. Like most production engines, the B58 doesn’t come equipped from the factory with sufficient cooling capabilities to cope with added power or even prolonged performance driving. CSF have designed a full line of B58 cooling options to help you get the most out of your BMW.

The BMW F-Series B58 engine is found in a wide array of BMW vehicles (M140i, M240i, 340i, 440i). The motor is similar to the S55 engine found in the F8x M2 Competition, M3 and M4 in that it has an indirect water-to-air charge cooling system with a supplemental front mount heat exchanger to cool the water that circulates through the charge cooler. However, unlike the S55 motor, the BMW B58 charge cooler is built into the plastic intake manifold housing. In the meantime of continued development of its high-performance manifold charge cooler, CSF has first released their new BMW B58 heat exchanger for BMW F-Series vehicles. CSF’s new high performance B58 heat exchanger drastically reduces water temperatures in the charge cooling cycle, which in turn reduces and stabilizes the intake air temperatures of the engine.  With many unique features, included accessories, and of course, industry-leading performance, it’s without a doubt the best option on the market for every consumer whether it be for a daily driver or a high-performance race car.

The original OEM B58 heat exchanger is a 1-row unit that is 27mm thick. In comparison, CSF has used its industry-exclusive world’s largest 2-row core (68mm) with CSF’s B-Tube technology. A unique tank design allows the larger CSF core to still fit into the OEM cooling system housing.

Another critical feature of the CSF BMW B58 high-performance heat exchanger is its unique triple-pass flow design. The water traveling through the upgraded heat exchanger flows through the radiator three times before exiting the cooler and flowing back into the manifold charge cooler. This ensures that the outlet water temperature of the heat exchanger is the absolute lowest it can be. The OEM design, as well as more expensive aftermarket designs, all have single-pass flow structures.

Take a look at the comparison graph done by CSF's R&D partner, Studio RSR in the photos.

FEATURES

• Core size: 524mm Length x 478mm Height x 69mm Wide
• Ultra-efficient 42mm 2-row core, with CSF’s B-Tube Technology, and 6.5mm multi-louvered fin height.
• Results in optimized airflow through the heat exchanger core and into other cooling system components for maximum performance of the entire cooling system (especially critical if installed in an xDrive model with transmission oil cooler placed in front of heat exchanger).
• Triple-pass flow design.
• Upgraded inlet/outlet design with new tapered entry and exit points from end tanks, resulting in optimized water flow and increased performance (matches OEM spec)*.
• Included detachable rock guard.
• OEM CNC machined mounting location pins and brackets.
• Direct plug-and-play design, including CNC machined “quick connect” inlet/outlet water fittings.
• Includes hardware mounting kit* for applications that have a factory transmission oil cooler mounted in front of the heat exchanger (xDrive models). 
• No modifications needed to install.
• Available in Semi-Gloss Black (#CSF8131B) or Polished (CSF8131).

PRODUCT UPDATE - OCTOBER 2019 PRODUCTION

• Upgraded inlet/outlet design with new tapered entry and exit points from end tanks, resulting in optimized water flow and increased performance (matches OEM spec).*
• Now includes hardware mounting kit* for applications that have a factory transmission oil cooler mounted in front of the heat exchanger (X-Drive models) 
  (OEM #17118625431).
• After extensive wind-tunnel, dynamometer (rolling-road test), and field testing, CSF engineers have improved the core spec from Version 1’s 68mm 2-row core with 8mm fin height to Version 2’s Ultra-efficient 42mm 2-row core, with CSF’s B-tube technology, and 6.5mm multi-louvered fin height. *
  • Increase of 15% more cooling tubes used in the core vs. V1 design for better surface area contact and heat dissipation.
  • Results in optimized airflow through the heat exchanger core and into other cooling system components for maximum performance of the entire cooling system. (Especially critical if installed in an X-Drive model with transmission oil cooler placed in front of heat exchanger)
  • CSF V2 design: 2-row 42mm core vs. OEM design: 1-row 26mm core. ~62% increase in core fluid capacity.

Available in polished and semi Gloss Black, please let us know when ordering.