Race haus APR Intercooler Kit for Audi S4 / S5 (B9)
Race haus APR Intercooler Kit for Audi S4 / S5 (B9)
Race haus APR Intercooler Kit for Audi S4 / S5 (B9)
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APR Intercooler Kit for Audi S4 / S5 (B9)

£1,308.87
£1,342.43
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-2%

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The APR Intercooler System is a massive front mounted upgrade that dramatically reduces intake air temperature (IAT), minimizes heat soak, and provides increased performance! The system is an easy to install, direct bolt-on design, that is recommended at every stage of performance

Quick Facts:
  • Dramatically lowers intake air temp (IAT)
    The factory intercooler reaches dangerously high IAT levels, even on the stock ECU!
  • Massive frontal surface area and core volume
    3.125" x 5.75" x 28.25" - 162.4 in² frnt. & 507.62 in³ volume - OEM
    2.250" x 16.2" x 22.00" - 356.4 in² frnt. & 801.90 in³ volume - APR
  • Highly effective core design
    Bar-and-plate core with staggered and louvered fins.
    Rigorous testing determined core style, fin density, and size.
    Low pressure drop + highly effective cooling = high performance!
  • Smooth cast end tanks
    Engineered for low turbulence/restriction and maximum flow.
    Organically shaped to promote airflow across entire core.
    Pressure tested to prevent power robbing boost leaks.
  • Easy to install
    Simple plug-and-play design with no trimming or drilling necessary!
  • Designed by engineers with lasers
    With the best equipment and smartest engineers, it just works!

Testing:
APR’s engineers tested each intercooler in a multitude of tests to show the impact the APR intercooler has on intake air temperature. The following tests were conducted with a 2017 S4 using the stock ECU calibration on 93 octane fuel and no other modifications. Ambient conditions during the stock intercooler tests were 72.8°F and 98.4 kPa with 78.7% relative humidity. Conditions were similar later in the day during during the APR Intercooler testing with 78.4°F and 98.5 KPa with 62.8% relative humidity. This gave the APR Intercooler no added advantage over the stock system during the tests.

Design: 
Unfortunately, to the untrained eye, many intercooler designs appear the same. However, effectiveness of the system and overall performance are greatly determined by several key metrics. Alloy selection, end tank design, construction type, fin style, fin density and overall core dimensions must be analyzed and balanced accordingly to deliver class-leading performance. While the OEM’s goal is to create a lightweight, easy to manufacture and inexpensive to produce, cross-platform design capable of supporting factory power levels, APR’s intercooler must be capable of supporting more than factory output. Achieving this goal took a multi-step approach focused around intercooler core selection, end tank design and install location.

Core Size:
APR’s Engineers also paid close attention to the balancing act between core effectiveness, pressure drop and space for end tanks through core sizing. With the core too small, pressure drop decreases dramatically, but typically results in a core incapable of effectively cooling. Likewise, with core size too great, pressure drop can increase, resulting in the turbocharger working harder. However, more importantly, with no space for appropriate end tanks, utilization of the core and overall effectiveness of the system diminishes rapidly, negating the benefit of the larger core. APR’s engineers were able to balance each of these characteristics to deliver maximum performance.

The APR system increases frontal surface area by 119.09% and has a 58% larger core!

Compatible models

  • AUDI S4 B9
  • AUDI S5 B9

 

At Racehaus, we value customer satisfaction above all else. We strive to ensure that all products are in stock and ready to ship. However, in the instance that a product is not immediately available, we will promptly notify you before you place your order, so you can avoid any disappointment. 

Our typical turnaround time for dispatch is between 2 to 5 days. Shipping starts from as little as £5.99

Please note that this timeframe may be subject to supplier availability. We take pride in being transparent about lead times, and if a product has a longer lead time, we will personally contact you to provide updates on the shipping process. 

Let us take care of all your product needs with excellent customer service.
We are happy to inform you that we offer worldwide shipping on all our products. You can place your order with confidence knowing that we are committed to maintaining a high level of service quality. 

In case you need to return your product, we offer a 14-day return policy. Please refer to our returns policy for more details. 

Additionally, to give you extra peace of mind, This product comes with a manufacturer's warranty. You can check our warranty policy for more information.

We're committed to providing you with personalised support and assurance with all your order decisions. Our team is constantly striving to improve your experience with us, and we stand behind every product we sell. We're here to help answer any questions you may have. 

Don't hesitate to contact us for more information or assistance.
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