CSF BMW M3 E90/E92/E93 Triple Pass High-Performance Radiator

Heat soak is a genuine limiting factor on a hard-driven E9X M3, and CSF's Triple-Pass High-Performance Radiator was engineered specifically to reduce it. Rather than a conventional single-pass design, coolant is routed across the radiator core three times before exiting - increasing contact time and heat transfer for the lowest achievable outlet temperatures, delivering roughly 20-25% more cooling capacity than a standard single-pass radiator.

At the core is CSF's exclusive B-Tube technology - rather than a single oval tube, two "B"-shaped tubes provide more surface area and greater strength while allowing for thinner, lighter, more thermally efficient material. This is paired with 6.5mm tall, ultra-efficient multi-louvered fins for maximum surface area contact. CNC-machined quick-connect inlet/outlet fittings and mounting brackets ensure a precise fit, and the radiator is a genuine drop-in replacement, accepting all OEM attaching components including quick-connect hoses, the AC condenser, mounting brackets, and fan shroud.

Works with: Manual transmission cars directly - automatic transmission cars require a separate oil cooler alongside this radiator.

Why Choose This Radiator

• Triple-pass flow design - coolant crosses the core three times for maximum heat rejection
• ~20-25% more cooling capacity than a conventional single-pass radiator
• CSF's exclusive B-Tube core technology - more surface area and strength than a standard tube design
• 6.5mm multi-louvered fins - maximised surface area contact for efficient cooling
• CNC-machined fittings and brackets - precise fit and long-term durability
• True drop-in fit - accepts all OEM attaching components, no modification required

Compatibility

• BMW E90 M3 Saloon (2008-2013, S65, manual)
• BMW E92 M3 Coupe (2008-2013, S65, manual)
• BMW E93 M3 Convertible (2008-2013, S65, manual)

Automatic transmission cars: require a separate oil cooler in addition to this radiator