Wagner Tuning Side Mount Radiator Upgrade for BMW F80 M3, F82 M4, F83 M4
Unlock cooler, more consistent performance from your S55-powered BMW M3 and M4 with the Wagner Tuning side mounted radiator. Designed specifically for the BMW F80 M3, F82 M4 and F83 M4, this high performance low-temperature radiator upgrade is a direct replacement that dramatically improves the efficiency of the indirect charge-air cooling system. Less heat soak, more reliable power on the road and track, and OEM-level fit and finish.
Why upgrade the S55 side radiator
The S55 3.0-litre twin-turbo in the M3/M4 uses an indirect charge-air cooling circuit. Lowering the coolant temperature in this circuit directly improves charge-air cooling, helping maintain intake air temps and power under sustained load. Wagner Tuning’s latest competition racing core increases cooling capacity and heat transfer while preserving airflow to surrounding components.
- High performance competition core for maximum heat rejection and reduced heat soak
- Substantial increase in core volume and frontal area compared to OEM
- Heat-conductive anti-corrosion coating for lasting durability
- Direct fit, plug and play installation with included carbon air shroud
- Proven upgrade for spirited driving, track days and fast road use
Technical highlights
OEM side mounted radiator dimensions:
250 mm x 165 mm x 40 mm
Volume: 1.65 litres
Area: 412.5 cm²
Wagner Tuning side mounted radiator dimensions:
252 mm x 188 mm x 68 mm
Volume: 3.2 litres (+94%)
Area: 473.8 cm² (+14.9%)
The optimised ratio of internal to external surface area maximises heat transfer while maintaining airflow to adjacent coolers, ensuring stable overall engine cooling performance.
Fitment
- BMW F80 M3 3.0 S55
- BMW F82 M4 3.0 S55
- BMW F83 M4 Convertible 3.0 S55
What’s in the box
- 1 x Side mounted radiator for the low-temperature circuit
- 1 x Carbon air shroud for the side mounted radiator
- 1 x Mounting hardware kit
- 1 x Installation instruction
Installation and support
This is a straightforward plug and play upgrade. For professional fitting, we recommend booking with Nforcd in Warwickshire. Request a fitting quote: Sales@nforcd.com.
Why buy from Nforcd
We have installed and used this Wagner Tuning side radiator on customer cars and our feedback is consistently positive: lower charge temps, far less heat soak and reliable, repeatable performance. Genuine parts, expert advice and support from a specialist who understands BMW M cooling upgrades.
Search-friendly overview
Wagner Tuning side mount radiator BMW F80 M3, BMW F82 M4, BMW F83 M4. S55 cooling upgrade for indirect charge air cooler water circuit. Low temperature radiator, side radiator upgrade, competition core water cooler. Direct fit, plug and play, carbon air shroud included. Reduce intake temps, reduce heat soak, improve reliability and performance on track days and fast road. Fits BMW M3 M4 2014–2020 F8X. Genuine Wagner Tuning BMW M3 radiator, BMW M4 radiator, S55 charge cooler radiator upgrade. Buy online from Nforcd UK, expert BMW M performance parts and fitting in Warwickshire.