Wagner Tuning S55 FMHE Charge Cooler Heat Exchanger / Intercooler Water Radiator Upgrade – Front Mount Low Temp Circuit Auxiliary Radiator for BMW F80 M3, F82 M4, F87 M2 Competition (2014+, 2018+) | Direct-Fit Performance Cooling | Part 400001003.FM

BMW S55 Chargecooler Heat Exchanger Upgrade by Wagner Tuning — F80 M3, F82 M4, F87 M2 Competition

Keep intake temperatures under control and protect consistent power on your S55-powered M car with Wagner Tuning’s uprated front auxiliary cooler for the low-temperature circuit. This direct bolt-in water-to-air intercooler radiator is designed for hard road use, spirited driving and track days, delivering dependable IAT stability and reduced heat soak on standard and tuned vehicles alike.

Part number: 400001003.FM

Why this upgrade

• Optimised for the S55 low-temp loop to support the chargecooler system on F87 M2 Competition, F80 M3 and F82 M4
• High-efficiency competition core increases coolant capacity by 89 percent for greater thermal headroom
• Frontal core area up by 46.4 percent for stronger heat rejection during repeated pulls and long sessions
• Heat-conductive, anti-corrosion coating for durable, repeatable cooling performance
• Bolt-in upgrade using factory mounting points and OE-style quick connectors
• Proven by us and our customers — reliable temps, confidence on fast road and track

The S55’s water-to-air setup relies on the low-temperature circuit to keep intake charge dense and power consistent. By increasing core size and coolant volume, this Wagner Tuning heat exchanger helps the chargecooler work more efficiently in summer heat, on back-to-back accelerations and across endurance stints, supporting Stage 1 and Stage 2 calibrations without fuss.

Technical details

Factory front auxiliary radiator:

• Dimensions: 590 mm x 308 mm x 25 mm
• Volume: 4.5 litres
• Core face area: 1817 cm²

Wagner Tuning upgrade radiator:

• Dimensions: 568 mm x 468.4 mm x 32 mm
• Volume: 8.5 litres (+89 percent)
• Core face area: 2660.5 cm² (+46.4 percent)

What you get

• 1 x front auxiliary heat exchanger for the low-temperature circuit
• Installation instructions

Vehicle fitment

• BMW F87 LCI M2 Competition 3.0 S55 — 2018+
• BMW F80 M3 3.0 S55 — 2014+
• BMW F82 M4 3.0 S55 — 2014+

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk.

Compatibility check

We verify fitment before dispatch. Add your UK registration or last 7 of your VIN at checkout so we can confirm suitability for your M2 Competition, M3 or M4.

Manufacturer

Wagner Tuning

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