Wagner Tuning Competition Charge Cooler Heat Exchanger/Intercooler Radiator for Toyota GR Supra A90 Mk5 3.0 & BMW Z4 G29 M40i (B58) – Uprated Auxiliary Front Mount Cooling Upgrade 2019+

Unlock reliable, repeatable performance from your 3.0-litre straight six with this uprated water-to-air charge cooler heat exchanger. Designed for the A90 GR Supra Mk5 and the G29 M40i roadster, this high efficiency front mounted unit replaces the factory auxiliary radiator for the charge cooling loop, cutting heat soak and keeping intake temps stable on road, track and dyno.

Engineered by Wagner Tuning, this competition-grade heat exchanger is a direct-fit, bolt-on upgrade that dramatically increases coolant capacity and thermal efficiency in the charge cooling circuit. More coolant volume and a smarter core design mean lower IAT, stronger sustained power and improved consistency on back-to-back pulls.

Why upgrade your charge cooling system

• The B58 water-to-air setup relies on coolant to remove heat from compressed air. Cooler coolant equals cooler intake air.
• Reduced heat soak for harder, longer sessions on fast road and track days.
• Ideal foundation for Stage 1 and Stage 2 remaps, hybrid turbos and spirited driving.

Key features

• Massive capacity increase – radiator volume up by 117 percent versus the stock unit for significantly improved thermal headroom.
• High performance competition core – optimised inner to outer surface area for maximum heat transfer while maintaining excellent airflow to surrounding components, including the main engine radiator.
• Thermal anti corrosion coating – durable, heat-conductive finish helps sustain cooling efficiency over time.
• Plug and play fitment – direct replacement using factory connections and mounting points. Installation instructions included.

Dimensions and specs

• OEM unit: 576 mm x 495 mm x 27 mm — Volume 7.70 litre — Surface area 2851 cm²
• Wagner competition unit: 524 mm x 468 mm x 68 mm — Volume 16.70 litre — Surface area 2454 cm²

Vehicle compatibility

• GR Supra A90 Mk5 3.0 from 2019
• BMW G29 M40i 3.0 from 2019

Real world results

We have installed this upgrade for customers and on our own builds, and the feedback is consistently positive. Expect cooler charge temps, more consistent lap-after-lap performance and a noticeable reduction in heat fade on repeated acceleration runs.

Perfect search matches

If you are looking for a Supra A90 heat exchanger upgrade, G29 M40i intercooler radiator, B58 charge cooler radiator, uprated auxiliary radiator, front mount heat exchanger for Supra, BMW M40i cooling upgrade, high capacity chargecooler, performance cooling for B58 or a direct fit charge cooler radiator for fast road and track, this is the one.

Professional installation

Want it fitted properly first time? Book your installation with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote.