AIRTEC Motorsport Chargecooler Radiator/Heat Exchanger Upgrade for BMW M2 Competition (F87), M3 (F80) & M4 (F82/F83) S55 - Front Mount Twin-Pass, High-Capacity

High performance cooling for BMW F8X S55

Keep intake temperatures under control and enjoy repeatable power with this uprated low temperature radiator for the S55-powered BMW M2 Competition, M3 and M4. Designed as a front positioned water-to-air intercooler radiator, it massively improves coolant volume and heat rejection, making it ideal for fast road, track days and tuned setups where heat soak can blunt performance.

What makes this LTR a serious upgrade

• Huge fluid capacity increase: 9.9 litres vs 4.5 litres factory, giving far greater thermal headroom
• Approx 40 percent larger frontal core area for improved heat transfer and lower IATs
• Twin pass core layout to maximise coolant dwell time and efficiency
• Direct fit to OEM mounting points with factory quick-connect hose fittings, no cutting or trimming
• Removable stone guard to protect the enlarged core in its forward position
• Durable black powder coated finish with a comprehensive fitting kit and clear instructions

On the S55 engine, stable intake temps equal consistent power. The standard auxiliary radiator for the intercooler circuit can struggle during repeated pulls or on a mapped car. This high capacity heat exchanger uses the available space behind the bumper to deliver a significant jump in coolant volume and surface area, helping the system shed heat quickly and maintain strong performance.

Real world results

We have installed and used this cooler on our own F8X builds and customer cars. Feedback is consistently positive, with quicker recovery between runs, more stable IATs on spirited drives and track use, and a noticeable improvement in consistency on remapped Stage 1 and Stage 2 cars.

Optimised for the F8X platform

Works with the stock water-to-air charge cooler on the S55. For enthusiasts chasing the lowest possible temperatures, it pairs brilliantly with AIRTEC’s billet manifold charge cooler for a further drop in intake temps.

Dimensions and specifications

Factory low temperature radiator:
Width: 590 mm
Height: 308 mm
Depth: 25 mm
Capacity: 4.5 litres
Frontal area: 181 cm²

Upgraded low temperature radiator:
Width: 540 mm
Height: 410 mm
Depth: 45 mm
Capacity: 9.9 litres
Frontal area: 221 cm²

Compatibility

• BMW M2 Competition F87, S55 twin turbo
• BMW M3 F80, S55
• BMW M4 F82 and F83, S55

Installation

Direct replacement using original mounts and connectors. No cutting or trimming required. For professional fitting, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Why enthusiasts choose this cooler

• Reliable temperature control for repeated hard use
• Ideal supporting mod for remaps and hybrid turbos
• Plug and play fitment with OEM quality finish
• Protects performance on hot days and in traffic

Search terms people use

BMW F8X low temp radiator, S55 LTR, intercooler water radiator, front mounted heat exchanger, F80 F82 F83 F87 cooling upgrade, M2C cooling mod, M3 auxiliary radiator, M4 water to air intercooler radiator, IAT reduction S55, heat soak solution BMW, track day cooling F8X, twin pass core cooler, performance cooling pack BMW, bolt on cooling upgrade, stage 2 S55 cooling, remapped S55 temperature control, BMW charge cooler radiator, high capacity cooler for BMW M2C M3 M4.