Mishimoto Performance Auxiliary Radiator - F8x - S55

Product Details

High coolant temperatures and thermal degradation are the enemies of sustained lap times on the S55 powered BMW F8X M3 and M4. Mounted low in the front bumper fascia, the factory auxiliary cooling units quickly heat soak under circuit conditions, while their structural integrity is compromised over time by track vibration and road debris. The Mishimoto Performance Auxiliary Radiator is engineered to provide the extra thermal headroom required for back to back hot laps. By replacing brittle OEM plastic end tanks with hand TIG welded aluminum assemblies and incorporating strutted core tubes, this unit withstands severe track fatigue while providing superior cooling capacity. Pushing 32% more external tube surface area and a 9% volume boost over original equipment, it ensures maximum heat rejection when driving your M car at the limit.

Key Features

• Race ready thermal expansion engineered to eliminate S55 heat soak during high load track sessions

• High strength TIG welded aluminum end tanks eliminate OEM plastic cracking risks

• 32% larger external tube area paired with a 9% increase in core volume over the factory unit

• Internal strutted tube architecture increases core rigidity against track impacts and vibration

• Reversible mounting orientation accommodates both driver side and passenger side placement

• Detachable steel mesh stone guard safeguards the cooling fins against track tire marbles and gravel

• Protected by Mishimoto’s Lifetime Warranty for track and street confidence

Specifications

• Part Number: MMRAD-F80-15A

• Core Construction: Brazed Aluminum with Strutted Internal Tubes

• End Tank Material: TIG Welded Aluminum

• Core Volume Increase: 9% Over Stock

• External Surface Area Increase: 32% Over Stock

• Protection: Removable Mesh Stone Guard

• Placement: Driver Side or Passenger Side (Direct OEM Replacement)

Prop 65 Warning

Product Q&A

Lifetime Replacement

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