CSF Cooling - Racing & High Performance Division Audi B5 S4 High-Performance All-Aluminum Radiator (7071)
SKU: 42923039956

CSF Cooling - Racing & High Performance Division Audi B5 S4 High-Performance All-Aluminum Radiator (7071)

Sale price$251.55 Regular price$279.50
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Ships within 48 hours · Estimated delivery Jul 9 - Jul 14

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Description

CSF Cooling - Racing & High Performance Division Audi B5 S4 High-Performance All-Aluminum Radiator (7071)Audi B5 S4 High Performance All Aluminum Radiator. CSF manufactures the most advanced and efficient radiator in the industry for your B5 S4. CSF uses innovative tube and fin technologies with industry leading testing methods to maximize airflow and heat dissipation. CSF has over 5 decades of experience manufacturing radiators. So when it comes to keeping your engine cool and your B5 S4 running at its best, a CSF High Performance All Aluminum Radiator

Audi B5 S4 High-Performance All-Aluminum Radiator. CSF manufactures the most advanced and efficient radiator in the industry for your B5 S4. CSF uses innovative tube and fin technologies with industry-leading testing methods to maximize airflow and heat dissipation.

CSF has over 5 decades of experience manufacturing radiators. So when it comes to keeping your engine cool and your B5 S4 running at its best, a CSF High-Performance All-Aluminum Radiator is the obvious choice. Designed to perform on the street or at the track, a performance radiator is a must-have for both high horsepower builds as well as race vehicles which need added cooling performance in motorsports environments. This radiator features a 2-Row core with CSF's exclusive B-Tube Technology: Unlike a regular oval shape "O" type radiator tube, CSF uses a specially engineered tube in the shape of a "B". These "B-tubes" are carefully formed and then brazed over the seam to seal. CSF is able to use thinner and lighter aluminum material (with better cooling efficiency) because this design is actually stronger than normal "O" shape tubes that are welded. The design (inlet in the middle of the tube that is seam brazed) increases the heat transfer surface area of the tubes by approximately 15% over regular tubes - producing the efficiency of two smaller tubes vs. one large tube within the same space criteria. With "B-tubes" you are able to get "dual liquid laminar flow". CSF also uses ultra efficient multi louvered fins that are carefully and precisely aligned to maximize airflow through each radiator core. Fin specifications are carefully measured and calculated for each application, and tested for maximum heat rejection efficiency in our wind-tunnel lab.The CSF B5 S4 radiator is a true "Drop-in fit" design requiring no modifications to install. OE style brackets are all CNC machined and welded for the best durability possible. Inlet/Outlet connections are designed to match the OE connections so you can reuse OEM hoses or aftermarket. Trust the cooling experts at CSF for the best performing, highest-quality, and most reliable radiators.

Features:

  • 2-Row 42mm Core (Dual Core) Featuring CSF's Exclusive B-Tube Technology
  • CSF, The Cooling Experts, have been serving the US aftermarket for almost 4 decades. With over 30 million units sold, CSF is your exclusive source for Radiators, Condensers, Intercoolers, Inverter Coolers, Racing Radiators and Pressure Caps.
  • Core Features an Ultra-Efficient Fin with 6.5mm Fin Height and Multi-Louvered Design for Maximum Surface Area Contact
  • CNC Machined "Quick-Connect" Inlet/Outlet Connections
  • CNC Machined Brackets and Fittings for Superb Fit and Durability
  • All-Aluminum Race Style Drain Plug
  • Smooth Satin Finish
  • Drop-in Fit

Get it all from CSF! With over 3000 models to chose from, CSF's coverage is second to none.When you choose CSF, you are dealing directly with the manufacturer, not a broker or an importer. CSF's factories are ISO certified, and are OE suppliers to many US, German and Asian manufacturers. When you purchase a CSF product, you can be rest assured that it has been manufactured on the same production lines with the same high quality standards as their OE customers. Every single radiator is subject to rigorous testing procedures such as Hydrostatic Testing, Vacuum decaying and life cycle testing, and is designed to always be a "drop-in fit".

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: 42923039956

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4.6 ★★★★★
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Nadia
Dallas, US
★★★★★ 5
Happy
Size: size for 3/6/CX5 Non-Turbo
They fit my car. So im happy
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
D
Verified Purchase
Daniela Smith Peixoto
Port Orchard, US
★★★★★ 4
Only received one of the two filters
I had to return because I only received the cabin filter, not the engine filter. Delivery was delayed and maybe this caused the misplacing of the other part. Not sure. I am placing another order, hoping that it will be complete this time. It is good qualiflty, though.
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Reviewed in the United States on December 20, 2025
H
Verified Purchase
Happy ag
New York, US
★★★★★ 5
Buy these, save some $$
Size: size for ASCENT/CROSSTREK/IMPREZA/LEGACY/OUTBACK
Save yourself about $100 by replacing these yourself, we have a Subaru Impreza. Easy to install for a few minutes time spent on YouTube. The dealers make a bundle on this sort of thing.
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Reviewed in the United States on April 3, 2026
A
Verified Purchase
A_CPA
Charlottesville, US
★★★★★ 5
Two Filters, Quick and Easy
Size: 16-23 Tacoma, Size: 16-23 Tacoma
The RVgolf Engine+Cabin Air Filters Kit for the Toyota Tacoma V6 comes with two air filters. There is a cabin air filter that fits nicely into the compartment accessed through the glove box and an engine air filter that dropped in easily in the compartment under the hood. Replacement of both filters was easy, didn’t require any tools, and it took more time to empty and replace the items in the glove box than it did to replace both filters. The Toyota dealership quoted me $80 to replace the cabin air filter only. I replaced both filters for less than $30. The filters felt like they were good quality. The engine air filter is multi-layered, with a thin foam layer to keep larger debris from blocking the finer paper filter. The cabin air filter said and looked like it had a carbon layer to absorb smells. The only concern I had was size. After I had replaced both filters I went to slide the engine air filter I replaced into the RVgolf box to throw it away. The engine air filter I replaced would not slide into the RVgolf box. It was too big. After driving for a few days and a couple of hundred miles, I popped the hood and checked the fit of the engine air filter. The fit looked perfect. See attached photos.
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Reviewed in the United States on May 9, 2026
J
Verified Purchase
jennifer
Grantham, US
★★★★★ 5
Fits 2019 accord (gas engine)
Size: 18-22 Accord
Dealer was going to charge almost $200 to change both of these filters in my 2019 accord. These filters fit perfectly and of same quality as the dealer product. Easy to install, saving me lots of money.
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Reviewed in the United States on April 28, 2026

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