525 Valve Cover  Breathers ( SOLD AS A SET  )(NOTE: This is one front and one back)
SKU: 15366862710

525 Valve Cover Breathers ( SOLD AS A SET )(NOTE: This is one front and one back)

Sale price$112.50 Regular price$125.00
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

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Description

525 Valve Cover Breathers ( SOLD AS A SET )(NOTE: This is one front and one back)The common misconception about valve cover breathers, is the filter media used in your most common breathers is for filtering air into the engine. This is false. The motor experiences constant blow by, therefore, constant pressure is being emitted from the crank case. As your "filter" clogs up with oil & dirt during racing conditions, the rate at which the engine can relieve the constant pressure slows down. Increased crank case pressure puts pressure

The common misconception about valve cover breathers, is the filter media used in your most common breathers is for filtering air into the engine. This is false. The motor experiences constant blow by, therefore, constant pressure is being emitted from the crank case. 

As your "filter" clogs up with oil & dirt during racing conditions, the rate at which the engine can relieve the constant pressure slows down. Increased crank case pressure puts pressure behind the pistons, causing you to lose power the more the filter media gets clogged. 

Our Breathers are TRUE breathers. They have no filter media and are free flowing. No more clogging, no more crankcase pressure, and no more power loss throughout the race. The pathways inside the breather also allow for you to wash your racecar without ever having to take them off. THATS RIGHT, no more duct tape covering your valve covers. 

Will these breathers gain you power? No, but will they let you keep your power throughout the race? Absolutely! 

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: 15366862710

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B
Verified Purchase
Beata Dec
Fort Morgan, US
★★★★★ 5
Perfect
Color: Grey, Color: Grey
Fits like a glove. Good quality. Looks great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 27, 2024
A
Verified Purchase
Adrian Padilla
West Palm Beach, US
★★★★★ 4
Not OEM material, doesn’t slide as easily. Feels like it will last longer.
Color: Grey, Color: Grey
Thought it was going to be the same quality as OEM, might last longer but definitely has a different texture. Fits well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 24, 2026
S
Verified Purchase
skrause
New York, US
★★★★★ 5
Very happy
Color: Grey, Color: Grey
This is a 3d printed part. It fits great, looks excellent, works fantastic. I bought the grey version. Work the part in carefully, take your time. The seller’s video in the description is very helpful! Great alternative to dropping $100 on a replacement. Excellent value, fast response and shipping..
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Reviewed in the United States on December 6, 2024
W
Verified Purchase
Works for ‘01 E46 BMW M3!
Massapequa, US
★★★★★ 5
Works for E46 M3
Color: Black
Great customer support, fits like it should, is a nice detail that you’ll notice if yours is broken. Looks like OE. This is my first 3D printed part, I hope it’ll last another 20 years. Has lasted almost a year so far!
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Reviewed in the United States on June 18, 2024
B
Verified Purchase
Blaise L.
Belleville, US
★★★★★ 3
Off - color
Color: Black, Color: Black
Flimsy, pretty obviously 3D printed. It's noticeably blue in color, but no one in the front seats will notice. This is good as an aesthetic bandage fix, but I'll go back to sourcing an OEM piece.
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Reviewed in the United States on September 3, 2024

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