Wagner Tuning Radiator Kit for G29 BMW Z4 / A9x Toyota GR Supra (OPF)

The Wagner Tuning Radiator Kit for the G29 BMW Z4 and A9x Toyota GR Supra is engineered to significantly improve cooling efficiency for vehicles equipped with the B48 2.0L I4 turbo and B58 3.0L I6 turbo engines. Designed as a competition-grade water cooler upgrade, this kit increases overall cooling volume by an impressive 117%, helping dramatically reduce coolant temperatures and stabilize thermal performance under sustained load. By maintaining more consistent operating temperatures, the system supports reliable power delivery during spirited driving, track use, or high-performance tuning, making it an essential upgrade for owners seeking maximum, repeatable performance from their OPF-equipped G29 and A9x platforms.

Why the Wagner Tuning Radiator is the Best Choice for Your B58

• Record-Breaking Volume Expansion: Wagner Tuning equips the Competition racing water cooler with an intercooler core that increases total cooler volume by an impressive 117% compared to the factory unit (16.70 liters vs. 7.70 liters OEM).
• Direct Performance Boost: Wagner Tuning’s design lowers coolant temperatures within the indirect intercooler circuit, improving charge-air cooling, stabilizing overall system thermodynamics, and helping prevent heat-related power loss.
• Maximum Heat Transfer: Wagner Tuning optimizes the ratio between internal and external cooling surfaces to ensure maximum heat dissipation while maintaining sufficient airflow for surrounding components.
• Durability & Protection: The cooler is finished with a heat-conductive, anti-corrosion coating to deliver long-lasting, reliable cooling performance.
• Plug & Play Installation: Wagner Tuning designs the kit for straightforward, near plug-and-play installation, supported by clear and user-friendly instructions.
• Technical Detail: Wagner Tuning engineers the cooling circuit specifically to optimize performance for B48 and B58 engines.
  • Wagner Tuning notes that the 2.0L B48 and 3.0L B58 turbo engines used in the BMW Z4 G29 and Toyota Supra A90 / A91 rely on an indirect intercooler system, where charge air is cooled via a dedicated coolant circuit. Reducing coolant temperature is therefore critical to improving charge-air efficiency.
  • The Wagner Tuning upgraded water cooler addresses this limitation with a 117% increase in volume, allowing the coolant to remain at lower temperatures for longer periods. This is especially important for high-performance vehicles and OPF-equipped models that experience increased thermal stress.

Features

• 117% increase in cooling volume
• Competition-grade racing intercooler core design
• Reduced coolant temperatures in the indirect intercooler circuit
• Improved charge-air cooling and stabilized system thermals
• Helps prevent heat-related power loss under sustained load
• Optimized internal-to-external cooling surface ratio
• Maintains sufficient airflow
• Black heat-conductive, anti-corrosion surface coating
• Cooling circuit optimized specifically for B48 and B58 engines
• Designed for OPF-equipped vehicles with increased thermal demands
• Plug-and-play style installation
• Made in Germany

Specifications

• Dimensions: 524mm x 468mm x 68mm
• Volume: 16.70 liters (+117% vs OEM at 7.70 liters)
  
• Surface Area: 2454cm²

Applications

• BMW Z4 sDrive20i: G29 | 2018-present | B48 2.0L I4 turbo
• BMW Z4 sDrive30i: G29 | 2018-present | B48 2.0L I4 turbo
• BMW Z4 M40i: G29 | 2018-present | B58 3.0L I6 turbo
• Toyota GR Supra: A90, A91 | 2020-present | B58 3.0L I6 turbo

Notes

• Only compatible with cars equipped with OPF
• Installation instructions

About Wagner Tuning

Wagner Tuning is a Germany-based performance engineering brand specializing in high-efficiency charge-air cooling and intake solutions for modern turbocharged vehicles. Known for its competition-proven intercoolers and precision-manufactured components, Wagner Tuning combines advanced R&D, CFD analysis, and rigorous testing to deliver measurable performance gains, improved thermal stability, and long-term reliability. With a strong focus on motorsport-inspired engineering and OEM-level fit and finish, Wagner Tuning products are designed to support both high-performance street driving and demanding track use across a wide range of European and international platforms.