CSF 99-06 VW Golf / GTI / 99-06 Jetta / GLI High-Performance All-Aluminum Radiator

With over five decades of specialized experience in radiator manufacturing, CSF stands as a benchmark of quality and innovation in automotive cooling solutions. The CSF 99-06 VW Golf / GTI / 99-06 Jetta / GLI High-Performance All-Aluminum Radiator exemplifies this legacy, engineered to deliver superior cooling performance for your MK4 Volkswagen, whether on daily roads or competitive tracks.

This radiator is meticulously designed to meet the demanding requirements of high horsepower engines and motorsport environments where enhanced cooling efficiency is critical. Featuring a robust 2-Row core, it incorporates CSF's proprietary B-Tube Technology, a significant advancement over conventional oval "O" type tubes. The unique "B" shaped tubes are precision-formed and seam-brazed, allowing the use of thinner, lighter aluminum that outperforms traditional welded tubes in both strength and heat dissipation.

The innovative design increases the heat transfer surface area by approximately 15% compared to standard tubes, effectively doubling the cooling efficiency within the same spatial constraints. This is achieved through the dual liquid laminar flow facilitated by the "B-tubes," which optimizes coolant movement and heat exchange. Complementing this, CSF employs ultra-efficient multi-louvered fins with a 6.5mm fin height, carefully aligned to maximize airflow through the radiator core. Each fin specification is rigorously tested and calibrated in CSF’s wind-tunnel laboratory to ensure peak heat rejection performance.

Installation is straightforward and hassle-free, thanks to the radiator’s true "Drop-in fit" design. It requires no modifications, preserving the integrity of your vehicle’s original setup. The CNC-machined and welded OE-style brackets guarantee exceptional durability, while the inlet and outlet connections are engineered to match OEM specifications. This compatibility allows for the reuse of original or aftermarket hoses, ensuring seamless integration with existing components such as the AC condenser, mounting brackets, and fan shroud.

Key Features

• 2-Row 42mm Core (Dual Core) incorporating CSF’s Exclusive B-Tube Technology for enhanced strength and cooling efficiency
• Ultra-efficient multi-louvered fins with 6.5mm fin height, maximizing surface area contact for superior heat dissipation
• CNC Machined "Quick-Connect" inlet and outlet connections for precise fit and ease of installation
• CNC Machined brackets and fittings delivering exceptional durability and perfect alignment
• All-aluminum race-style drain plug designed for reliability and ease of maintenance
• Smooth satin finish for corrosion resistance and aesthetic appeal
• True "Drop-in fit" design requiring no modifications; compatible with all OEM attaching components including hoses, AC condenser, mounting brackets, and fan shroud

Applications

OEM Part Numbers

• Volkswagen: 1J0 121 253 S
• Volkswagen: 1J0-121-253-S
• Volkswagen: 1J0121253S
• Volkswagen: 1J0 121 253 AD
• Volkswagen: 1J0-121-253-AD
• Volkswagen: 1J0121253

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.