Forge Motorsport Chargecooler Radiator Toyota Supra A90 19-Present BMW Z4 B58 18-Present
£906.70
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Description
With modern day aftermarket ECU tuning pushing powerful engines harder. In certain conditions the vehicle will run the risk of receiving inadequately cooled air affecting the engines efficiency and ultimately losing power.
With this in mind, Forge are proud to release another PolarCooler as the first auxiliary cooling system for the BMW B58 engine Found in the A90 Supra. Following extensive testing on the road and dyno working with 3 different styles of water core with different fin pitch configurations, we are proud to present the ultimate in frontal water cooling solutions.
If you are a keen modifier and wish to push the limits of your A90 this chargecooler is a must, With 177% increase in volume hot climate owners will definitely appreciate the development that has gone into this product resulting in safer IATs (inlet air temps) for a longer period of time meaning when on track it takes longer for the standard ecu to reduce ignition timing which will create power loss. With the Forge PolarCooler it results in more power for longer with peace of mind for track day sessions.
The PolarCooler is available in either a powder coated satin Black finish or motorsport raw Alloy.


The uniquely developed Forge PolarCooler features:
- An increase of over 170% extra capacity using a 18 fpi (fins per inch) louvre super tech cooling core for maximum cooling.
- The PolarCooler replaces the OEM chargecooler radiator.
- This chargecooler has been designed featuring triple pass water flow to ensure all of the surface area of the core is utilised, meaning maximum cooling efficiency.
- This unique design has allowed inlet temperatures to be lowered by 20°C (68°F) in 3 back to back runs on the dyno.
- The Forge PolarCooler locates in the OEM position and is supplied with anti-corrosion black powder coat on the hand fabricated end tanks and core or motorsport raw alloy
- A reduction of the temperature of the cooling water is directly equated with an improved cooling performance of the charged air.
- With an increase in volume of water introduced to the cooling system the thermal temperatures can be kept at a much reduced level over a longer period, ensuring greater performance and efficiency which in turn is perfect for your fast road and track enthusiast. The Forge radiator has a volume of 23 litres compared to the OEM of just 8.3 litres.
Dimensions:
OEM:
500mm x 615mm x 27mm (8.3l)
Forge Polarcooler:
480mm x 600mm x 80mm (23l)

This product is designed, developed and manufactured entirely in Great Britain and is covered by our worldwide lifetime warranty. We estimate that it will take around 4-5 hours to complete installation of this product.

RETURNS & Warranty
Returns Policy
We want you to shop with confidence at Sansoms Specialist Parts. If you are not completely satisfied with your purchase, you may return eligible items in accordance with the policy below.
Returns must be requested within 14 days of delivery
Items must be unused, uninstalled, and in original packaging
Products must be returned in a resaleable condition
Proof of purchase is required
Custom-made, special-order, or clearance items may be non-returnable unless faulty.
How to Request a Return
Please contact our support team before returning any item. Returns sent without prior authorisation may be refused.
Email: support@sansomsspecialistparts.co.uk
Include your order number and reason for return.
Refunds
Once your return has been received and inspected, we will notify you of the outcome. Approved refunds will be processed to the original payment method within 5–10 working days.
Original shipping costs are non-refundable unless the item is faulty or incorrect.
Warranty Information
All products sold by Sansoms Specialist Parts are covered by a manufacturer’s warranty, where applicable.
Warranty coverage typically includes:
Manufacturing defects
Faults occurring under normal use
Warranty does not cover:
Incorrect installation
Wear and tear
Damage caused by misuse or modification
Track or competition use unless stated otherwise
Warranty Claims
To make a warranty claim, please contact us with:
Order number
Description of the issue
Supporting photos or videos
Claims are subject to inspection and manufacturer approval.
Important Notes
Professional installation is strongly recommended
Warranty may be void if parts are incorrectly fitted
Vehicle compatibility is the customer’s responsibility
Need Help?
If you have any questions regarding returns or warranty, our team is happy to assist.
Delivery & Stock
Delivery Options
We aim to get your performance parts to you as quickly and safely as possible.
Standard UK Delivery: 3–5 working days
Express UK Delivery: 1–2 working days (subject to availability)
International Delivery: 5–10 working days (depending on location)
All orders are carefully packaged to ensure your parts arrive in perfect condition.
Shipping Costs
Standard delivery is charged at checkout based on weight and destination
Free UK delivery on orders over £100
We offer tracked shipping so you can monitor your order every step of the way.
Stock Availability
Most parts are held in stock for immediate dispatch
Some specialist or custom parts may have longer lead times
Stock levels are updated regularly, but occasionally items may be temporarily unavailable
If a product is out of stock, we will notify you immediately and offer alternatives or an estimated delivery date.
Order Processing
Orders are typically processed within 1–2 working days
You will receive a confirmation email once your order has been dispatched
Large or heavy items may require additional handling time
Important Notes
Performance parts may require professional installation
Delivery times are estimates and may vary during peak periods
International shipments may be subject to customs or import fees
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