SKU: 68969568992

AMS Alpha Performance Cooler System | Audi S4 B8

Sale price$1159.07 Regular price$1287.85
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Ships within 48 hours · Estimated delivery Aug 19 - Aug 24

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Description

AMS Alpha Performance Cooler System | Audi S4 B8The Alpha Performance Audi B8 (B8. 5 coming soon) Supercharger Cooler System is a great addition to your S4 whether your car is stock or modified. The Alpha Performance Audi B8 Supercharger Cooler System is a great addition to your S4 whether your car is stock or modified. The system features a large, high efficiency heat exchanger located at the front of the car, an additional reservoir that holds over a gallon of coolant and a high flow pump which

The Alpha Performance Audi B8 (B8.5 coming soon) Supercharger Cooler System is a great addition to your S4 whether your car is stock or modified.

The Alpha Performance Audi B8 Supercharger Cooler System is a great addition to your S4 whether your car is stock or modified. The system features a large, high efficiency heat exchanger located at the front of the car, an additional reservoir that holds over a gallon of coolant and a high flow pump which runs complementary to the factory pump. Whether you live in a warm region of the world, enjoy long spirited drives in the mountains or run long sessions at your local track day, the S4 Boost Cooler will keep your intake temps low, maintaining your 3.0 TFSI supercharged engines maximum output.

As with all Alpha Products, everything needed to install the system is included – bolts, fittings, lines etc. Best of all, no drilling or modifications to the car are required, it’s a 100% bolt in affair.

The ‘Core’ of the System

The most important part of an efficient heat exchanger system is the core, skimping here could mean the overall performance of an ‘upgraded’ system might be worse than stock! The OEM unit is a single pass design with a core area of 156in^2. Our Alpha core is a high quality, triple pass unit where the coolant makes three passes through the heat exchanger vs competing cooling kits which use a single pass design. The core is made in the UK with a fin area of 417in^2, almost three times the surface area of the stock core! For added durability the fins are hemmed for strength, able to withstand abuse from road debris.



Increased Coolant Capacity, Decreased Heat Soak

The hand fabricated Alpha coolant reservoir acts as a large heat sink to keep coolant temperatures low and stable. With over a gallon more coolant on board, it increases the cycle time of the coolant in your S4 allowing it to dissipate more heat before being recirculated, working as a large thermal reservoir, keeping the horsepower-killing heat soak at bay.

Pumping Up the Power!

To give you the best possible performance and keep the coolant flowing efficiently through the larger Alpha heat exchanger, we added an additional high flow brushless pump to run in conjunction with the OEM brushless pump. The combination of the two pumps allow a very high flow rate to keep the fluid moving and maintains that flow rate at higher pressures giving you the assurance your car will stay cool in hot climates, extended track sessions or everyday driving. See graph below for pump data.



The Devil is in the Details:

To provide your S4 with the best cooling system on the market we thoroughly tested multiple variations of the Alpha Supercharger Cooler System. We tested divorced and non-divorced systems finding that divorcing the system showed no real gains, only added complexity. We found the stock pump stops flowing at 8psi so we added an additional brushless pump to support running higher pressure and maintain flow. Data log after data log was recorded and the results analyzed until our engineers were completely satisfied.

All testing/logging was performed on our Dynojet dynamometer doing 1st through 5th gear pulls with conditions and ambient air temps equal.

Post Intercooler Air Temperature:

This graph shows the difference between stock VS Alpha air temperatures after the air has passed through the intercooler, cooler air means more horsepower!

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Post Intercooler Coolant Temperature:

This graph shows the difference in coolant temperature between the stock system and the Alpha Supercharger Cooler kit after the coolant has passed through the intercooler to cool the air charge. Lower temps mean the car can maintain maximum output!

Pre Intercooler Coolant Temperature:

This graph shows the ability of the Alpha system to pull more heat out of the cooling system. Notice how the water temps stay more consistent with the Alpha Cooler. If the heat rejection was the same between the stock and Alpha system, the lines would trend the same.



Heat Rejection of Air:

This graph shows heat rejection of OEM versus Alpha Performance system. Heat rejection is a perfect indicator of how the system performs because the starting temperature does not affect the data. The Alpha system has significantly greater heat rejection throughout the run and rejects more heat on deceleration allowing for quicker cool down time.


System Includes:


  • High Quality Triple Pass Heat Exchanger
  • Hand Fabricated Reservoir
  • Brushless Coolant Pump
  • 4 ply Heavy Duty Silicone
  • Brushless Pump Plug-in Jumper Harness
  • All Hardware Needed for Install

Exclusive Benefits:


  • Much Better Heat Rejection vs Stock
  • No Loss of Horsepower from Heatsoak
  • Car Runs Cooler all the Time
  • Cooler Intake Temps
  • Increased Efficiency of the OEM Intercooler
  • No Drilling or Modification to the car Required – 100% bolt on!

Product Notes:


  • NOT compatible with S4 or S5’s equipped with Audi Dynamic Steering

Kit Instructions


  • Alpha Performance Audi S4 B8 Supercharger Cooler System Install Instructions can be downloaded here.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 68969568992

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Mitchell Sasala
Whiting, US
★★★★★ 5
Not as durable as advertised.
This hose is not as durable as advertised. First time I used it and didn't work. The hose itself was slit or had some other issue with the band inside because water leaked through the hose and did not reach the nozzle. Update: I wrote to the manufacturer of the hose, Pocket Hose, regarding the defective hose. On May 30, 2026, they agreed to replace my hose under their warranty. On June 2, 2026, I received an email from them stating they recently updated their warranty policy to 30 days, and my notice was outside their 30-day warranty period. I then received an email from the seller of the hose, Bulb Head offering me a full refund on the hose. Something the manufacturer would not do. All I wanted was a replacement. I am changing my rating for the seller to 5 Stars for standing behind the sale of their product. Thank you, Bulb Head!
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Reviewed in the United States on May 30, 2026
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Marilyn
Lowell, US
★★★★★ 5
Great hose
Style: Regular, Size: 150 FT
I love these hoses. Length:I have a 50’ for the front yard and 150’ hose for the backyard. Nozzle is perfect for watering flowers, garden or great for washing the car. Flexible: Lightweight and so easy to move around. Turn off the water at the house and let it drain out the nozzle. Doesn’t take long to drain and return to original length. Durability is excellent. Connectivity is so easy.
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Reviewed in the United States on May 24, 2026
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James V Lynch
Battle Creek, US
★★★★★ 3
Great product until it split
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