Best Breather Engine Valve Covers in 2026

Compatible with:2006-2011 Mercedes ML350/E350/R350/C350 2008-2012 Mercedes C300/GL550 2006-2007 Mercedes C230/C280 2010-2012 Mercedes GLK350 2007-2011 Mercedes S550/CLS550/E550 2006-2009 Mercedes CLK350 2007-2012 Mercedes GL450 2007-2010 Mercedes CL550 2007-2009, 2011-2012 Mercedes SL550 2007-2009 Mercedes CLK550 2009-2015 Mercedes G550 2010-2011 Mercedes ML450 2008-2011 Mercedes ML550 2010-2013 Mercedes S400 2006-2008 Mercedes SLK280 2009-2011 Mercedes SLK300 2005-2011 Mercedes SLK350

Content:1x Crankcase Oil Separator Cover, 2x30mm Expansion Plug, 1x 65mm Expansion Plug;

Replace Part Number:2720100631, 0009985690, 0009986590

For Chevrolet small block 265 and 400

Kit includes: stock height baffled covers, chrome t-bar hold downs, chrome PCV breather, chrome breather, chrome oil filler cap, grommets, and a stain

Designed for use with OE specifications for fit and function

Package Dimensions: 11.176 H x 51.308 L x 24.13 W (centimetres)

Package Weight: 7.4 pounds

Fit type: Vehicle Specific

Accepts all emissions equipment

Breather baffles prevent excessive oil usage

Engineered for serviceability and styled for excitement

Fits all original& aftermarketpolished aluminum, chromed aluminum,etc. valve covers.

O.D. 1 1/4" I.D. 3/4" (these are most commonly used for PCV valves)

Package includes: 2 x breather grommets

Short Style Black Coated Finned Valve Covers

Each Cover includes one breather hole

Fits 87-97 small block Chevy 283, 305, 327, 350 and 450 with center-bolt pattern

Relieves positive crankcase pressure

Direct replacement for oil cap

One-way check ball for MAF based cars

✅ Valve Cover Compatible with 2008-2013 BMW 128i , Compatible with 2007-2013 BMW 328i , Compatible with 2007-2008 BMW 328xi , Compatible with 2009-2013 BMW 328i xDrive , Compatible with 2008-2011 BMW 528i , Compatible with 2008 BMW 528xi , Compatible with 2007-2012 BMW X3 , Compatible with 2007-2010 BMW X5 , Compatible with 2006-2011 BMW Z4

✅【OE Part NUMBER】 11127552281, 11 12 7 552 281, 11-12-7-552-281,264-935

✅【PACKAGE】1 pcs Valve Cover Kit includes: 1 * NEW Engine Valve Cover + 1 * NEW Oil Filler Cap + 1 * NEW Engine Valve Cover Gasket + 3 * NEW Spark Plug Tube Seals + NEW Bolts + 3-Way PCV Crankcase Breather Hose【NOTE】 Please reference to the first picture as shown.

Full Polished Aluminum

1 3/4" Tall By 7/8" Wide at base

3/4" Tube for 1 1/4" Hole in Valve Covers

Designed to work with Fabricated Sheet Metal and Cast Aluminum Valve Covers, without logo, that have a 1.220" diameter hole

Replacement Valve Cover Grommets for breathers and oil filler caps two per pack

Fit type: Universal Fit

Aluminum Valve Cover Oil Cap Breather For LSX LS1/LS2/LS3/LS6/LS7,For Pretty much any LSX engine!

100% new aftermarket valve cover oil cover with venting holes to protect the engine from dust and impurities, improve engine performance.It's made of solid billet aluminum, which is resistant to corrosion and rust.

It is CNC-machined from billet aluminum for precise fit, and the included silicone O-ring is specially designed to prevent oil seepage at the base of the adapter.

Pair of Brand New Chevrolet Script Satin Black Powder-Coated Aluminum Tall Valve Covers for Small Block Chevy's. | * These Covers are produced by Billet Specialties Inc. (Part # BLK95223).

Billet Specialties powder-coated aluminum valve covers are guaranteed to draw attention to your engine compartment.

Includes a 1 1/4" diameter breather hole positioned between the rockers to reduce oil splash. | * Valve covers are produced from a high-grade aluminum that is powder-coated to Billet Specialties standards and each design is CNC machined in the USA.

15/16″ id x 1 1/4″ od (package of 2)

Made of 14 gauge 6061-T6 aluminum, this baffle mounts inside Moroso valve covers under the breather hole to keep oil from getting into the breather  Use with Valve Cover Breathers Nos. 68720, 68721, 68722, 68723, 68724, 68725, 68730, 68740, 68741, 68781, 68810, 68813 or 68817  Cannot be used with engines equipped with stud girdles  One per package includes all necessary fasteners

Part number: 68790

Fit type: Vehicle Specific

A fast easy way to help customize your engine compartment with that stealth look

Engineered for high performance street vehicles with positive crankcase ventilation and race cars with vacuum balance systems

1 inch outside diameter necks and .625 inch breather tubes with an integral metal baffle and foam element

Kit allows engine builder to install filtered breathers on Moroso steel or aluminum valve covers (or other covers with 1.22" holes) without welding

Consists of two filtered breathers with clamps, two chrome plated adapter tubes and two valve cover grommets

Filters must be oiled before use

Valve cover set fits small block Chevys using center bolt style cylinder heads

Valve covers are constructed from quality cast aluminum and have a polished finish

Circle track design with two 1-3/8 inch baffled breather tubes on one side only

Chevy small block flamed chrome steel engine dress up kit fits 1958-1986 Chevy 283-305-327-350 small block engines.

1 pair of flamed baffled short OEM style chrome steel valve covers.

1 engine dipstick with chrome steel tube.

①Fits 1965-95 BBC Chevy 396-502 Constructed with 1/4 Thick Billet Rail

②Tall style ,3-11/16" height (will clear roller rockers & stud girdles)

③They feature a FULL billet rail. The rail is very thick to make sure that you never have sealing or leaking issues.

A pair of chrome push in valve cover breathers with matching grommets.

This Breather Cap is thick gauge steel with chrome steel finish and a 1" diameter stem size

Works great with most chrome steel or aluminum valve covers

★This is a brand new Finned,polished aluminum breather and PCV valve set.

★Grommets fit 1-1/4" aluminum valve cover holes,Fits 1" i.d. rubber grommets.

★4" long,2-1/4" wide,2" tall,Oval shaped,add a cool look to your valve cover.

19mm Valve cover breather fitting

Adapter for K Series engine valve cover - Allows to install 10AN Lines for oil catch can

Compatible with Honda Civic SI, Accord - Compatible with Acura Rsx Tsx - K swap Cars K20 K24 (2.0L - 2.4L)

Fits: BBC Cylinder Heads 3-1/2" Tall Includes two breather/filler cap grommets and one baffled and one non-baffled PCV grommet *Not legal for sale or use on pollution-controlled vehicles

Engine Valve Covers Tall Finned Style Made of Polished Aluminum

Compatible with Chevrolet BBC Big Block Chevy 396 427 454

Includes Oil Baffles, Stainless Hardware

Compatibility: Round push in breather is replacement for Chevy /Ford 327 350 396 454 302 351W 502.

Application: 1in tube for 1‑1/4in hole in valve cover, this round push in breather has long service life, convenient operation.

Tight Fit: Fits very tightly in the valve cover, use a little oil when installing, the tight fit ensures that the breather does not turn or come off when the engine is running

Feature - Small Block Chevy Tall Finned Valve Cover

Application - Small Block Chevy

Style - Tall

Nostalgic finned valve cover breather

Please use with grommet speedway part # 550-6375 to fit a 1-1/4" I.D. hole

This features a beautiful polished aluminum finish

[FITMENT] - The aluminum billet tappet cover compatible with 1989-2022 Dodge Ram 1500/2500/3500 Cummins 5.9L 12V 24V Diesel ONLY!!

[UPGRADED] - The material of the original tappet cover is a flimsy piece that is very easy to bend. Our upgrade billet aluminum material is much more rigid and durable.

[PERFECT FIT] - Precision-engineered and CNC machined for a perfect replacement and leak-free sealing.

Rubber grommets (included)

1-1/4" hole for breather / PCV

Tall valve covers: 3-3/4”H

Modern laser etched “Chevrolet” and Bow Tie logo

High quality 100% TIG welded construction from 6061 T5 aluminum

Thick 1-piece billet aluminum gasket flange for excellent sealing