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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18
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Description
BFI "Clean Catch" - Crankcase Oil Separator (Audi B8 4.2) (NLA)One of the biggest areas of concern for the longevity of your FSI direct injection engine is the long term effects of oil vapor deposition in the intake and valve train. Even though all FSI engines come equipped with a cyclonic oil separator from the factory time has shown that these separators are not enough and that the biggest contributor to these vaporized oil deposits on the intake valves and plenum are the gasses emanating from the PCV system.
One of the biggest areas of concern for the longevity of your FSI direct injection engine is the long term effects of oil vapor deposition in the intake and valve train. Even though all FSI engines come equipped with a cyclonic oil separator from the factory time has shown that these separators are not enough and that the biggest contributor to these vaporized oil deposits on the intake valves and plenum are the gasses emanating from the PCV system. Without additional filtering and maintenance your intake valves could look like this:
We have designed the best Oil Separator on the market for the B8 S5 platform. Designed to help remove excess oil/water vapor from the intake tract and increase the longevity of your direct injection engine. The Clean Catch Oil Separator will be the only catch can you will ever need to buy.
Made from the highest quality components, these catch cans are built to last a lifetime, and beyond. Designed from the ground up with the honing of many different iterations of internal baffle design, these cans both look and function as well, or better than any on the market today.
Each can employs a specifically designed V-shaped baffle to maximize surface area for increased deposition of condensed vapor, without sacrificing the flow characteristics necessary for the PCV system to function correctly.
Each design has undergone an extensive long term testing process - in both street and race applications to ensure that each can functions with maximum efficiency, without any loss in performance. Utilizing CNC aluminum components along with aerospace quality hose, connectors and hardware, these cans both function and look like an OEM quality piece.
Every Clean Catch system comes with a matte powder coated aluminum can, high flow #8 braided and sport-crimped hoses and hose ends, along with in-house designed CNC machined PCV Port adapter and can bracket, as well our proprietary VAGPORT connection system, a revolutionary PCV connection system,consisting of custom designed and machined port adapters specific to Volkswagen and Audi applications.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.6 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 5
Great sock liners
Size: Medium, Color: (001) Black / Black / Pitch Gray
Awesome socks. Has little gel pad on top of heel for no slip. Thin and comfortable. Previously Purchased at Nordstrom rack and no longer in stock. Happy to find here
Note: Will shrink a little best to air dry
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Very good product
Size: Medium, Color: (001) Black / Black / Pitch Gray
I purchased these to wear inside lowcut slip on casual shoes, I don't particularly like to not wear socks in my shoes for hygienic reasons. Prior to purchasing these socks, all I could find were those made of very light beige hosiery type material , and my slip on shoes would slide around a bit. These are light weight and breathable athletic type material, with a very good gripper strip at the heel. One pair of my slip on casual shoes have a particularly lower cut in the toe area, but the shoe is black and I chose the black color and though I see a hint of the sock there, it matches and does not detract from the look of the casual solid black shoe
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Reviewed in the United States on May 15, 2026
★★★★★ 5
They stay out! No more sock wads!
Size: Medium, Color: (100) White / White / Mod Gray
Best no show socks ever made!!!!! I've been struggling for 2 years to find ones that actually stay on your foot, even other national brands, and I just became content wearing my sneakers without socks. They ALWAYS slid down into my show & I ended up walking on a wad of sock until I could fix it...or usually just took them off after a couple of tries. Enter Under Armor!!! They a mid weight, but not very thick & still breathable. They work too by actually staying on your foot! Not once have they slid down into my show!! Very comfortable but they could be a little more affordable.
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Reviewed in the United States on August 1, 2025
★★★★★ 5
Love!
Size: Large, Color: (100) White / White / Mod Gray
Ive tried so many no show socks but I love these. This is the 3rd set I've bought. They never slip off and the material is thin and breathable. Perfect for working out.
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Reviewed in the United States on March 2, 2026
★★★★★ 5
True no-show socks that don’t slide down!
Size: Medium, Color: (100) White / White / Mod Gray, Size: Medium, Color: (100) White / White / Mod Gray
This is the first pair of no-show socks I’ve tried that actually don’t slide down into my shoes. Trust me… I have tried lots of different pairs and this is the one! They fit perfectly. They’re not too thick and they’re obviously durable because I wash them after each wear, so daily.
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Reviewed in the United States on March 21, 2026