do88 BMW B58 Gen 1 (M140I/M240I/340I/440I) Front Mount Heat Exchanger

The B58 Gen 1 uses a water-to-air charge cooler paired with a front-mounted heat exchanger (water radiator). This radiator cools the water flowing through the charge air cooler, and that water in turn dissipates heat from the charge air before it enters the engine. It's evident this system needs increased cooling capacity to prevent heat soaking, the factory unit quickly heat soaks under pressure, leading to elevated intake air temperatures and inconsistent power delivery during demanding driving.

do88's replacement directly addresses this with a 66% larger core volume than the factory unit, using a dual-row, 48mm thick design for genuinely increased cooling surface area. A triple-pass layout allows water to pass through the radiator three times rather than the factory's single pass, maximising core surface area utilisation for more effective heat rejection. Full aluminium construction with durable TIG-welded end tanks delivers genuine long-term durability and heat dissipation, making this a sound upgrade for track use, spirited street driving, or tuned B58 engines.

Works with: OEM mounting points and factory components.

Why Choose This Front Mount Heat Exchanger

• 66% larger core volume than the factory unit
• Dual-row, 48mm thick core design for increased cooling surface area
• Triple-pass layout, water passes through the core three times versus the OE's single pass
• Full aluminium construction with durable TIG-welded end tanks
• Combats heat soak during demanding driving conditions, stabilises intake temperatures
• Suitable for track use, spirited street driving, or tuned B58 engines

Compatibility

• BMW F20/F21 M140i/M140iX (B58 Gen 1)
• BMW F22/F23 M240i/M240iX (B58 Gen 1)
• BMW F30/F31/F34 340i/340iX (B58 Gen 1)
• BMW F32/F33/F36 440i/440iX (B58 Gen 1)