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APR Air-To-Water Intercooler System Audi (B9) RS4/RS5 2.9T
£2,317.35
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Installation Instructions
An installation guide is available for this product, download here.
The APR Air-to-Water Intercooler System for the B9 RS4 / RS5 2.9T EA839 offers a substantial leap in performance that directly translates to more horsepower and torque, and consistent performance that’s unmatched by the factory cooler. The factory cooler struggles to cool the charged air resulting in excessive intake air temperature due to its small size. This struggle results in ECU protecting the engine by pulling power during a single quarter mile pass, lap around a track, or even during a spirited drive. Simply bolting on the APR System relieves this issue, resulting in an instant boost in power and consistency. The APR system has no trouble remaining consistent thanks to its ability to resist power-robbing heatsoak!
Features
- 194% larger than the factory intercooler
- 5,500cm³ vs the undersized 1,870cm³ factory unit
- Dramatically lowers intake air temperature
- Consistently more horsepower and torque
- Flows more than stock at every measured pressure differential
- CFD optimized cast aluminum end tanks
- Proprietary aluminum cooling core
- CNC machined and tig welded construction
- Application specific coolant hoses
- Application specific ez-flow charge air hoses
- CNC bent and laser cut brackets
- Does not negatively impact emissions
- Does not require tuning
- Instructions and support included
APR’s engineers conducted multiple back to back 60-130 MPH acceleration testes to illustrate how well the APR system was at maintaining consistent intake air temperature compared to the factory system. This was conducted on a closed track using an APR Stage 1 (93) equipped Audi RS5 with ambient conditions hovering around 33°C (91°F).
The factory ECU has a range in which it will derate power based on intake air temperature. In doing so, the tests can be skewed because when the ECU derates power, intake air temperature stabilizes. As illustrated below, this only comes into play when using the stock cooler.
During a single acceleration pull the factory cooler was already reducing power to control intake air temperature, meaning if it didn’t pull power, intake air temperature would be even higher. By the second pull it was hitting 75°C and aggressively pulling power to maintain that temperature to protect the engine. The engineers continued conducting the test and after 14 pulls showed the system consistently averaged 73°C across the 14 pulls. Further testing was aborted to protect the engine.
When switching to the APR cooler in the same hot and humid conditions the tests results were dramatically better. Intake air temperature leveled off quickly, and even after 28 back-to-back 60-130 MPH pulls were only at an average of 49C! Unlike the stock cooler, the system had no help from the ECU trying to control intake air temperature as it was not reducing horsepower in an effort to reduce IAT.
On average the intake air temperature with the stock system was +38°C or (+111%) over ambient whereas the APR system was only +16°C (+51%) over ambient. This dramatic difference means the ECU was not aggressively pulling power to protect the engine when using the APR Cooler as it was when using the stock cooler. With the APR Cooler power was higher pull after pull, making the car consistently quicker!
| Weight | 27.0 kg |
|---|---|
| Dimensions | 22.1 × 21.1 × 17.2 cm |
| Brand |
IC100028 Confirmed Fitment
Please note, this information is a combination of supplier provided compatibility data and our workshop expertise. While every effort has been made to ensure the accuracy of this information Progressive Parts Ltd are not liable for abnormalities or inaccurate data. Customers are wholly responsible for checking fitment for their vehicle. More information is available from our Terms & Conditions
A4 B9 Avant (8W5, 8WD) RS4 TFSi quattro (DECA) | 450hp
Petrol 2894cc | Estate | 2017 - 2025
A4 B9 Avant (8W5, 8WD) RS4 TFSI quattro (DECC) | 471hp
Petrol 2894cc | Estate | 2024
A5 (F53, F5P) RS5 TFSI quattro (DECA) | 450hp
Petrol 2894cc | Coupe | 2017 - 2025
A5 (F53, F5P) RS5 TFSI quattro (DECC) | 471hp
Petrol 2894cc | Coupe | 2024 - 2025
A5 Sportback (F5A, F5F) RS5 TFSI quattro (DECA) | 450hp
Petrol 2894cc | Hatchback | 2018 - 2025
A5 Sportback (F5A, F5F) RS5 TFSI quattro (DECC) | 471hp
Petrol 2894cc | Hatchback | 2024 - 2025
Stock at Progressive Parts
Delivery timescales are given as estimates in good faith, but cannot be taken as precise or exact information. We highly advise against booking installation/workshop time or engaging in preparatory work until you've received and inspected the goods.
What do our stock statuses mean?
1+ IN STOCK in green stock is readily available in one of our warehouses for express delivery (at the time of viewing).
LOW STOCK in green means we're running low! 1 or 2 left on the shelf so act fast. Over evenings, weekends and bank holidays this stock can move quickly so please bear this in mind.
0 IN STOCK in blue means our primary warehouse does not have unallocated stock, but our UK partners do. Often these can be shipped quickly and efficiently. You'll be notified via the Track My Order page if further delays are unavoidable.
MADE TO ORDER in blue means we've partnered with a supplier which primarily makes their products to order. It's not on our shelf, but your order goes into production immediately.
0 IN STOCK in orange means everybody we work with is unfortunately out of stock. Stock is not available in the UK. The best course of action is to place an order to create an allocation from the next batch arriving.
OUT OF STOCK in red. This product is unavailable to order, for whatever reason we're unable to obtain stock or there is an issue with supply/lead times.
We're tuners too!
Our staff are car enthusiasts, we understand the need for speed... This includes getting your orders out the door as quickly and securely as possible!
In some instances, extended lead times are unavoidable. This is as labour-intensive and frustrating for us as it is for you, please know we are doing our best to facilitate your modification goals. Abuse of our staff or systems will not be tolerated.
Thank you, Team PP
In the words of the Vehicle Standards Agency (VCA), type approval provides "confirmation that production and samples of a design will meet specified performance standards".
For emissions components this encompasses noise, emissions and balanced back pressure, which have a strong influence on maintaining engine performance (power), and fuel efficiency. Type approval ensures that an aftermarket component will reach, or exceed the performance standard of the corresponding OE part.
Type-approval then, is a certain guarantee that an end user will receive a product of OE equivalent performance attributes.
Products on the Progressive Parts website that meet this approval will be clearly marked or labelled EC or ECE approved.