Forge Motorsport Chargecooler Radiatorfor BMW 4 Series F32/33 LCI (2016 – 2020) 420i – 184HP

Forge are proud to release another PolarCooler as the first auxiliary cooling system for the BMW B48 & B58. Following extensive testing on the road and dyno working with 3 different styles of water core with different fin pitch configurations, we are proud to present the ultimate in frontal water cooling solutions.

 The uniquely developed Forge PolarCooler features:

• An increase of over 100% extra capacity using a 18 fpi (fins per inch) louvre super tech cooling core for maximum cooling.
• The PolarCooler replaces the OEM chargecooler rad.
• This chargecooler has been designed featuring triple pass water flow to ensure all of the surface area of the core is utilised, meaning maximum cooling efficiency.
• This unique design has allowed inlet temperatures to be lowered by 20°C (68°F) in 3 back to back runs on the dyno.
• The Forge PolarCooler locates in the OEM position and is supplied with anti-corrosion black powder coat on the hand fabricated end tanks and core .
• A reduction of the temperature of the cooling water is directly equated with an improved cooling performance of the charged air.
• With an increase in volume of water introduced to the cooling system the thermal temperatures can be kept at a much reduced level over a longer period, ensuring greater performance and efficiency which in turn is perfect for your fast road and track enthusiast. The Forge radiator has a volume of 17 litres compared to the OEM of just 7.71 litres.

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