CSF High Performance Heat Exchanger Toyota A90|A91 Supra|BMW G-Series 2018-2023

CSF Front Mount Heat Exchanger

High-performance all-aluminum charge cooler upgrade for Toyota Supra A90/91 and select BMW G-Series

Overview

After six months of development with top Supra tuners worldwide, CSF has engineered a front mount heat exchanger (FMHE) to address the notorious heat soak issues in the liquid-cooled charge air system of the Toyota Supra A90/91 and related BMW G-Series models. This unit is a vital upgrade for those pushing their B58-powered vehicles on the track or spirited driving, where overheating compromises power output and triggers limp mode.

Problem Addressed

• The stock liquid-to-air charge cooler integrated into the intake manifold quickly heat soaks under high load, causing spike in intake air temperatures (IAT)

• This leads to ECU power reduction and limp mode activation during track sessions or aggressive driving

• Factory heat exchangers aren’t sufficient for upgraded power levels, often requiring cooling aids like water sprays during races

• Existing solutions are limited since the charge cooler itself cannot be easily replaced due to its integration in the intake manifold

CSF Solution

• Upgrades the front mount heat exchanger (the radiator-like component that cools the charge air fluid before it circulates through the manifold cooler)

• Dramatically reduces IATs, improving power retention and consistency under extreme conditions

• Enhances overall cooling flow, benefiting both engine coolant and oil temperatures

• Plug and play drop-in fitment for ease of installation on Supra and compatible BMWs

Engineering Highlights

• CAD/CAM designed with Unigraphics Software for precise fit and performance

• OE-style radial and deep-drawn aluminum end tanks for durability and efficiency

• Utilizes “B-Tube” technology, the strongest and most efficient tube design in radiator manufacturing

• Wind tunnel tested for optimized cooling performance

• High-quality “Racing Style” aluminum drain plug included

Manufacturing Quality

• Brazed in CAB furnace for superior strength

• Military grade aluminum construction (JIS 3003 spec minimum)

• CNC machined fittings and brackets for perfect OEM-style connections

• Master class TIG welding ensuring leak-proof and durable build

• ISO 9001/9002 certified manufacturing processes

Features

• 2-row, 42mm ultra high-performance core

• 6.5mm tall multi-louvered fins for maximized heat dissipation

• CNC machined mounting brackets and OEM-style quick-connect inlet/outlet

• 100% all-aluminum TIG-welded construction

• Includes rock guard and transmission oil cooler mounting kit (exclusive feature)

• 2-year limited warranty

Fitment

• Toyota Supra A90/A91 (2020-2021)

• BMW G29 Z4 (2018-2019)

• BMW G20 3-Series (320i, 330i, 330ix, M340i, M340ix) (2018-2020)

• BMW G21 3-Series Touring (330i, 330ix, M340ix) (2018-2020)

Why Upgrade?

If you track your Supra or BMW G-Series with a B58 engine or have upgraded power levels, the CSF FMHE prevents heat soak and power loss by maintaining consistent, lower intake air temperatures — unlocking the true potential of your turbocharged engine.