SKU: 21587764300

Catch Tank for Audi S4/S5 B9

Sale price$158.36 Regular price$175.96
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Ships within 48 hours · Estimated delivery Sep 5 - Sep 10

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Description

Catch Tank for Audi S4/S5 B9This oil catch tank kit is the product of many months of intensive research and development by our in house development team, and the end result is by far the most complete oil collection system currently on the market. Not only is it beautifully designed, it has been created to capture the maximum amount of harmful contaminants, including oil deposits, unused fuel vapours and moisture, all of which would ordinarily make their way back through to the

This oil catch tank kit is the product of many months of intensive research and development by our in-house development team, and the end result is by far the most complete oil collection system currently on the market. Not only is it beautifully designed, it has been created to capture the maximum amount of harmful contaminants, including oil deposits, unused fuel vapours and moisture, all of which would ordinarily make their way back through to the inlet of the engine.

Extensive testing has proven our oil catch tank’s ability to effectively reduce sludge and carbon build up, in turn allowing the Audi S4 B9 3.0T engine to both breathe and perform more efficiently. It can therefore be viewed as a genuine performance enhancing product and one we recommend any owner of this vehicle seriously consider, particularly if they are planning more advanced power tuning at a later date.

The 0.4l (400cc) catch tank boasts a slew of features intended to make it both easy to check and simple to drain, including a dipstick for level inspection and a well-placed drain tap.

The design of the hose kit has also been carefully considered, hence its inner tube which is constructed from anti-static smooth fuel resistant nitrile rubber. This is paired with an outer cover made from reinforced stainless steel wire braid (a Forge specialty), specifically a partial inner braid and a full cover outer braid. We developed this complex arrangement in order for the tank to be resistant to both pressure expansion and vacuum collapse, and also to enable the kit to function within a clearly defined temperature range -54°C to +150°C (-65°F to 300°F)

Finally, the kit features a pair of stainless steel reinforced oil resistant hoses with black external braiding, which combine with the supplied fittings to form an OEM-looking product when installed, so much so that the engine cover can still be clipped into place!

 

Highlights

0.4L capacity*

A drain tap for ease of emptying.

A dipstick for simple level inspection.

2 Quality stainless steel reinforced oil resistant hoses with black external braiding for that inconspicuous look.

Fully assembled with fittings to suit the OEM connections.

Inner tube is constructed from anti-static smooth fuel resistant nitrile rubber

Outer cover is constructed from reinforced Stainless Steel wire braid consisting of partial inner braid & full cover outer braiding which is resistant to pressure expansion and vacuum

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: 21587764300

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4.8 ★★★★★
Based on 21 reviews
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A
Verified Purchase
AmazonBuyer
Battle Creek, US
★★★★★ 5
It works as expected
Size: 8.3" x 9.3" x 1.3"
Great. It does block air flow by a bit, but it is ok, if you don't need strong air blowing your face at maximum setting all the time.
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Reviewed in the United States on June 14, 2025
T
Verified Purchase
ThomasD
Draper, US
★★★★★ 5
Great cabin filter for 2019 Acura RDX
Size: 8.3" x 9.3" x 1.3"
When I have my car serviced at the Acura dealership, they routinely recommend that the cabin filter be replaced. As we all know, a dealership is going to charge an arm and a leg for a basic service. Therefore, I have been replacing the cabin air filter myself for the past few years. I like BOSCH products and when I found this filter on Amazon, I knew that was the one to purchase for my 2019 Acura RDX. The filter fits perfectly in its location in the glove box. It literally takes less than five minutes to swap out the old filter for the new. I will continue to use this product while I have the RDX.
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Reviewed in the United States on November 30, 2025
F
Verified Purchase
Frank L.
Lowell, US
★★★★★ 5
Perfect fit, easy installation.
Size: 8.3" x 9.3" x 1.3"
This part fits perfectly. Directional flow is printed on the part however you need to confirm which way air flows in the actual air box. The easiest test is to run the a/c with the filter out, wet a finger, and stick in in the air box to see which side the air blows cold. Then just install this part in the air flow direction as printed on the part. I have not noticed a difference in air quality yet, however I imagine being a HEPA filter, this will do wonders keeping pollen out of the car. Installed this in a 2011 Honda CR-Z. Easy installation. Part looks high quality which is fitting for Bosch.
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Reviewed in the United States on May 26, 2026
N
Verified Purchase
N. Fasso
Los Angeles, US
★★★★★ 4
Great filter, but doesn't fit 2013 Honda Fit without modification
Size: 8.3" x 9.3" x 1.3"
Right off the bat: I don't have any airflow problems with this filter. It works great, the air is noticeably cleaner, and airflow has not been meaningfully reduced. However, it doesn't fit my air filter holder very well. The ' air filter holder' (a plastic tray that slides horizontally into the air flow system) has two plastic fringes on either side of the tray, which each have two small notches in them, a few inches apart from one another. This appears to act as a sort of 'key' by which you can gauge you are putting the filter in with the correct alignment. On an OEM filter, the slots line up with two strips of material that stretch across the length of the filter, which themselves rest within the slots. However, the slots don't line up with the strips on this filter. I had to cut the fringes so that the slots in them are wider, so the strips would fit in them. Without doing this, the filter wouldn't press down into the tray. Having done that, and the filter now rests flush in the tray, there are still marginal gaps around the perimeter of the filter. It's a millimeter or two too small for the tray, so there is some airflow around the filter. This could be rectified by wrapping insulation tape or something around the edge of the filter, or could be ignored if you're not super picky. I haven't added any wrapping to get an airtight seal, and even with that gap I still noticed that the air is way better. So ultimately, it didn't fit exactly, but it fits 90% of the way and, with some finagling, is a superior filter by any other measure.
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Reviewed in the United States on December 3, 2018
L
Verified Purchase
Locutus
Charlottesville, US
★★★★★ 5
Don't overlook this important bit of maintenance
Size: 8.3" x 9.3" x 1.3"
Cabin air filters get dirty and gross quicker than you realize. I recommend changing them twice a year. Bosch is a quality brand, very happy with it.
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Reviewed in the United States on March 8, 2026

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