Wagner Tuning Competition BMW M3/M4 S55 F80 F82 F83 Low-Temp Charge Cooler Radiator Kit – Auxiliary Heat Exchanger & Water-to-Air Intercooler Radiators – F8X Bolt-On Direct-Fit Cooling Upgrade 400001003

Wagner Tuning Competition Low-Temp Cooling Pack for BMW M3 M4 S55 F8x

Chase cooler intake temps and repeatable performance on road and track with Wagner Tuning’s uprated auxiliary heat exchangers for the S55 charge-air water circuit. This precision engineered kit expands coolant capacity and fin area to shed heat faster, control IATs and fight heat soak during back-to-back pulls, spirited driving and track days. Part number: 400001003.

Why enthusiasts choose this upgrade

• Significant jump in coolant volume and external surface area for stronger heat rejection
• Stabler intake temperatures for consistent power over long stints
• High-efficiency competition cores designed for the S55 indirect air-to-water system
• Heat-conductive anti-corrosion coating for durability and long-term thermal performance
• Optimised fin geometry to preserve airflow to the main engine cooling stack
• Direct bolt-on in factory locations using supplied brackets and hardware

Real-world results

We have installed this cooling pack on multiple customer M3 and M4 builds and the feedback has been excellent. Owners report far more stable charge temps in hot weather and during extended sessions, with confident, repeatable performance when it matters.

What you get

• Front mounted low-temp heat exchanger
• Side mounted low-temp heat exchanger
• Carbon air shroud for the side unit
• All necessary mounting hardware
• Installation instructions

Technical highlights and dimensions

Front mounted heat exchanger

• OEM: 590 mm x 308 mm x 25 mm | Volume 4.5 litres | Area 1817 cm²
• Wagner Tuning: 568 mm x 468.4 mm x 32 mm | Volume 8.5 litres (+89%) | Area 2660.5 cm² (+46.4%)

Side mounted heat exchanger

• OEM: 250 mm x 165 mm x 40 mm | Volume 1.65 litres | Area 412.5 cm²
• Wagner Tuning: 252 mm x 188 mm x 68 mm | Volume 3.2 litres (+94%) | Area 473.8 cm² (+14.9%)

Cores feature a carefully balanced internal to external surface ratio to maximise heat transfer while keeping airflow to the main water radiator and surrounding components.

Compatibility

• BMW F80 M3 3.0 S55
• BMW F82 M4 3.0 S55
• BMW F83 M4 Convertible 3.0 S55

Installation and support

Direct replacement in OEM positions with no cutting required. For professional fitting, book with MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk.

Manufacturer

Wagner Tuning

Part number

400001003

Search-friendly terms

BMW M3 F80 cooling system upgrade, BMW M4 F82 F83 heat exchanger kit, S55 auxiliary cooler, S55 chargewater cooler, low temperature circuit cooler, uprated water-to-air intercooler cooler, performance cooling pack UK, M3 M4 IAT control, heat soak reduction, track day cooling mods, high efficiency cores, bolt-on cooling pack, OEM-location cooler set, carbon shroud cooler, BMW S55 cooling solution, F8x charge air water circuit cooler, endurance cooling upgrade, road and track cooling package, UK performance tuning parts, Wagner cooling pack for S55.