CSF 8154 Aluminium Intercooler Water Radiator / Chargecooler FMHE Upgrade – BMW 3 Series G20/G21 320i 330i M340i, BMW Z4 G29 20i 30i M40i, Toyota GR Supra A90/A91 MK5 – B48/B58 Auxiliary Front Mount Heat Exchanger

CSF 8154 Aluminium Intercooler Water Radiator Upgrade for BMW G20 G21, BMW G29 Z4 and Toyota Supra MK5

Keep charge temps under control and stop heat soak in its tracks. The CSF 8154 is a premium aluminium intercooler water radiator that replaces the small factory auxiliary cooler with a high efficiency unit engineered for hard road use and circuit abuse. Ideal for remapped and hardware-upgraded B48 and B58 builds, it delivers colder, more stable intake temperatures for repeatable performance on back roads, track days and the drag strip.

Whether you are on Stage 1, Stage 2 or a big turbo Stage 3 setup, raising boost creates heat that can overwhelm the stock chargecooler loop. CSF’s larger core increases cooling capacity and sheds heat faster, so the ECU does not pull timing and power stays consistent run after run. Expect a typical 5 to 15°C drop in charge temps depending on tune and conditions, plus quicker recovery between pulls and improved airflow through the cooling stack.

We have installed this heat exchanger on customer cars at MJ Modifications and on our own development vehicles. Feedback is exactly what enthusiasts want to hear: noticeably lower IAT, stronger repeatability on spirited drives, and reliable performance during long sessions.

Key reasons to upgrade

• Lower intake temperatures for sustained power and reliability on tuned cars
• Faster heat soak recovery during repeated pulls, track sessions and dyno runs
• Improves overall cooling stack efficiency which can help engine water and oil temps
• Perfect match for remaps, hybrid turbos and higher boost targets on B48 and B58 engines
• Direct replacement that looks OEM+ and fits behind the bumper without trimming

Technical highlights

• 2 row, 42 mm ultra high performance core with 6.5 mm multi louvered fins
• CSF exclusive B Tube technology for superior heat transfer and low pressure drop
• 100 percent TIG welded all aluminium construction with CNC machined mounting points
• OE style quick connect fittings for a true plug and play install
• Includes rock guard and transmission oil cooler mounting kit
• Hand polished mirror finish for a premium OEM+ appearance
• Tested worldwide by leading tuners, time attack teams and turbo kit manufacturers

Who it suits

Owners of performance focused BMW G20 and G21 petrol models, BMW Z4 G29 and Toyota Supra MK5 who want a reliable chargecooler radiator upgrade that reduces IAT, combats heat soak and keeps power consistent for fast road and track day use. Daily drivers, weekend warriors and competitive drivers all benefit.

Vehicle coverage

• BMW 3 Series G20 and G21 petrol models including 320i, 330i, M340i, rear wheel drive and xDrive
• BMW Z4 G29 including 20i, 30i and M40i
• Toyota GR Supra A90 and A91, often referred to as Supra MK5
• Engine compatibility: B48 2.0T and B58 3.0T water to air chargecooler systems

Part number

CSF 8154

What you get

• CSF aluminium intercooler heat exchanger assembly
• Rock guard and hardware including transmission cooler mounting kit
• Direct fit with OE style connectors

Installation

Direct replacement using factory quick connects with no permanent modifications. For professional fitting and coolant bleeding, we recommend booking with MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk.

Warranty

Backed by a 2 year CSF Radiators warranty.

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