AIRTEC Motorsport Uprated Auxiliary Radiator (DSG & Engine) for VW Golf Mk7/Mk8 R, Audi S3, Seat Leon, Audi TT

Keep your performance car running cooler for longer with the AIRTEC Motorsport Uprated Auxiliary Radiator, developed in the UK for both DSG transmission cooling and engine coolant control. Designed for demanding fast-road and track use, this upgrade directly addresses the well-known issue of high running temperatures in tuned MQB-platform cars.

The Problem

On cars running increased power, prolonged spirited driving or track use can push both DSG oil and engine coolant temperatures beyond safe limits. When this happens, the ECU automatically reduces torque and slows gear shifts to protect the drivetrain—making your car feel less responsive, and in extreme cases, risking long-term damage.

The AIRTEC Solution

To combat this, AIRTEC Motorsport has engineered a larger, wider, and thicker auxiliary radiator that significantly improves cooling efficiency. With a 67% increase in capacity over the factory unit and a quadruple-pass core design, coolant is forced to circulate through the core four times, ensuring maximum heat dissipation before exiting.

The result is improved cooling stability, allowing your engine and DSG transmission to perform consistently at their peak for longer.

Key Features & Benefits

• 67% Capacity Increase – Wider and thicker than OEM, raising coolant volume from 1.08L to 1.8L.

• Quadruple-Pass Core – Extends coolant flow path for superior temperature control.

• Direct Fitment – Utilises OEM mounts and connectors with minimal trimming required.

• Stone Guard Protection – Removable shield prevents damage from road debris.

• Durable Finish – High-quality black powder-coated surface for long-term protection.

• Comprehensive Fitting Kit – Includes all fixtures and a detailed installation guide.

Fitment Applications

• VW Golf R Mk7 / Mk8

• Audi S3 8V

• Audi TT 8S (2.0 TSI)

• SEAT Leon Cupra 5F

Options:

• Right-hand side cooler – DSG transmission cooling

• Left-hand side cooler – Engine coolant cooling

Dimensions

OEM Radiator

• Width: 188mm

• Height: 216mm

• Depth: 26.5mm

• Capacity: 1.08L

AIRTEC Uprated Radiator

• Width: 200mm

• Height: 216mm

• Depth: 42mm

• Capacity: 1.8L

Why Choose AIRTEC Motorsport?

With decades of motorsport engineering expertise, AIRTEC Motorsport designs, tests, and manufactures its cooling solutions in the UK. This uprated auxiliary radiator has been developed specifically for high-performance MQB-platform cars, ensuring the perfect balance of fit, function, and reliability.