APR Intercooler Kit for Audi S4 / S5 (B9)
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
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!
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.
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.
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!
Any items ordered then subsequently cancelled by the customer before delivery will incur 10% handling fee and will receive the remaining balance within 14 working days
Do we ship abroad ?
Yes we do, to almost anywhere in the world though remember the postage is often high when shipping anything bulky. Most bulky items we export will go by UPS so you can track the package online, Delivery times vary due to stock and import checks.
However there are a few countries we do not ship to, some of these include: Thailand, Malaysia, Indonesia, Russia, Nigeria, Macedonia, Syria, Ukraine, Lebanon.
Why is postage on bulky items to some countries expensive compared to some other companies ?
For both yours and our safety we use well known couriers such as DPD Local and UPS for shipping, then we know exactly where it is in the world at any time and we know its going to arrive safely. We can now ship using standard post on some items, however using all methods you may incur import charges when you receive the goods for which we cannot be responsible for.
How do I place an order if I live within the UK ?
You can either order here in our online shop or you can phone us or email us, using the following number/address are below.
Phone: +44 (0)1945 429000
How do I place an order if I live outside the UK ?
You can order online or by phoning or emailing us.
Phone: +44 (0)1945 429000
Yes we offer free fitting on most Milltek Catback systems, Just select the option at the checkout
No, Due to our Public Liability Insurance we do not fit any customer supplied parts.
Yes depending on how long the job will take and if you are happy to wait, We have a waiting area inside our reception
Yes, But please be aware most exhaust systems will not fit in the back of the car it is being fitted to! We will help cut the exhaust into sections to aid you taking the system back with you. We allow 7days for collection of your old exhaust, after this time we will dispose of the system.