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034 Motorsports Auxiliary Side Mount Radiator Upgrade Kit for Audi S4/S5 B9/B9.5 2018+
$505.80

034Motorsport Auxiliary Side Mount Radiator Upgrade Kit

If you own a 2018-2025 Audi S4 or 2018-2024 Audi S5, and you're pushing your car to its limits on the track or tackling winding backroads, the 034Motorsport Auxiliary Side Mount Radiator Upgrade Kit is an essential upgrade for keeping your engine cool. This kit is specifically designed for those who demand more from their vehicles, especially in hot climates or during high-performance driving.

Why Upgrade?

Under hard driving conditions, your factory side-mounted radiator might struggle to keep up with the increased coolant temperatures generated by your engine. This can lead to overheating, reduced performance, and even potential engine damage. The 034Motorsport upgrade replaces your stock radiator with a larger, more efficient CSF Radiator, which significantly boosts your cooling capacity.

Performance Features

  • Increased Cooling Capacity: The CSF #8132 radiator features a quadruple pass design for superior heat dissipation.
  • Dimensions: 215mm x 185mm x 42mm, compared to the OE size of 195mm x 185mm x 26mm, offering a 69.6% increase in physical volume.
  • Front Surface Area: 397.75 cm², which is a 10% increase over the OE radiator's 360.75 cm².
  • CNC Machined Connections: Ensures a secure and leak-free fit.
  • Precision Bent Stainless Steel Mounting Bracket: Designed for durability and a perfect fit.
  • Retains OE Air Duct: Maintains airflow efficiency.

Compatibility and Installation

This upgrade is tailored for Audi models equipped with the factory driver-side auxiliary radiator. To confirm fitment, simply pop the hood and check for the auxiliary radiator located in the front driver-side fender well. If your vehicle lacks this component, you can retrofit it using OEM parts, which are listed below.

What's Included

  • CSF #8132 Radiator
  • Removable Metal Rock Guard
  • Billet Aluminum Adapters (x2)
  • Stainless Steel Mounting Bracket (x1)

Retrofit Components

For those without the factory driver's side auxiliary radiator, the following components are necessary for installation:

  • 8W0 122 101 AM - Coolant Inlet Hose w/ Divorced Fitting
  • 8W0 122 055 Q - Coolant Outlet Hose w/ Divorced Fitting
  • 8W0 121 333 A - Air Guide for Aux Radiator
  • Additional clamps and fittings as specified in the installation instructions.

Real-World Testing

The 034Motorsport team rigorously tested this radiator upgrade on their development B9 S4s, both on backroads and at various racetracks. The results were clear: this upgrade dramatically improves cooling performance over the factory setup, ensuring your engine stays within optimal temperature ranges during intense driving sessions.

Installation Instructions

Ready to install? For detailed installation instructions, CLICK HERE.

Fitments

  • Audi S4 B9 | B9.5 2018+
  • Audi S5 Coupe & Sportback 2018+
Proposition 65

WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
2018-2025
Audi S4
2018-2024
Audi S5
2018-2025
Audi S5 Sportback

034 Motorsports Logo

Who is 034 Motorsport?

034 Motorsport was founded in 2005 for enthusiasts by enthusiasts with a passion for bringing motorsport-quality performance upgrades and tuning to Audi and Volkswagen vehicles. Since its inception, the company has grown to meet the expanding needs of petrolheads with innovation, quality, and performance in mind. 034 Motorsport is dedicated to providing customers with only the finest performance products, tuning, and service for their Audi or Volkswagen.

Dedicated to the Car Scene

034Motorsport is owned and operated by car enthusiasts just like you! This means that you can count on them for expert advice and products that deliver each and every time. When they aren’t at work, you can find the 034 Motorsport folks at local car meets, Audi Club Track Days, or simply at home working on their own rides.   

Being gearheads themselves, the 034 Motorsport staff understands the importance of a strong automotive community and giving back to the customers they owe their success to. 034Motorsport is a proud sponsor of Audi Club North America's Golden Gate Chapter, in addition to several other popular automotive forums, including Audizine, Fourtitude, VWvortex, and QuattroWorld. The brand also supports NorCal Audi Club, and frequently hosts events for its members.

Involvement in Competition Racing

034Motorsport stays true to its roots (and name) by actively participating in motorsport events, like time attacks, endurance racing, and hill climbs. These events allow the company to simultaneously showcase its products and racing expertise, while putting them to the ultimate test. A number of 034 Motorsport’s most iconic projects, including the Time Attack A4, GTI-RS, and 80tq raised the bar for on-track performance, while also accelerating production and testing processes. 

Extensive Quality Product Lineup

034 Motorsport is well-known for producing some of the finest race-proven performance upgrades for Audi and Volkswagen enthusiasts. The 034 Motorsport performance facility is located in Fremont, California and home to its engineering, manufacturing, and tuning departments. The company prides itself on in-house manufacturing, where it designs, fabricates, calibrates, and tests all products under one roof with complete control. 034 Motorsport carries a wide range of products that includes suspension parts, motor mounts, intakes, silicone hoses, and numerous underhood goodies.

Find 034 Motorsport at Vivid Racing

You can find an extensive lineup of quality 034 Motorsport parts right here at Vivid Racing. We carry everything from 034 Motorsport blow-off valves, cold air intakes, intercoolers, differentials, and ventilation systems to wheel spacers, springs, turbos, mid-pipes, and steering components. Whatever you may possibly need, chances are we carry it! If you cannot find a particular item above or have any questions, please call our sales team at (480) 966-3040.

It is the intention of 034Motorsport to sell only quality products. We offer a 1-year warranty against defects in workmanship or materials, not extending to normal tear and wear or mis-use. You must provide us with a proof of purchase, defect or the result of wear or mis-use. Some products have less than 1-year warranty. Please inquire before ordering.

034Motorsport will only replace or repair warranty items. No refunds will be given. 034Motorsport or the product manufacturer will inspect or test all products prior to a warranty claim adjustment. This process may take up to 6 weeks. You must obtain an RMA number from either Customer Service or Technical Support prior to any return. All products we offer are warranted to be free from defects prior to installation. Any modification or improper use voids this warranty. This warranty does not cover installation. 034Motorsport shall be the final arbitrator in interpreting the extent and remedy of warranty.

034Motorsport warranties are not transferrable, and available to the original purchaser only, however if you do buy a 034Motorsport part second hand and have a problem with it, do contact us as we can typically arrive at a reasonable, fair solution.

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