Valve Covers & Accessories - Breathers

1-1/2" Clamp-On Filtered Breather w/Shield
Your Price:
$21.99

1-1/2" Clamp-On Filtered Breather w/Shield

620-70156

1-1/2" Clamp-On Filtered Breather w/Shield (each)

Hardin’s breathers feature maximum flow and protection from airborne elements. They are used on most Hardin Marine valve cover systems. These breathers are easily washable for service.


1-1/2" Clamp-On Valve Cover Breather - No Shield
Your Price:
$19.99

1-1/2" Clamp-On Valve Cover Breather - No Shield

620-70153

1-1/2" Clamp-On Valve Cover Breather - No Shield (Each)

These breathers feature maximum flow and protection from airborne elements.  They are used on most Hardin Marine valve cover systems.  The breather is washable providing for easy maintenance.


1-3/8" Clamp-On Valve Cover Breather - No Shield
Your Price:
$19.99

1-3/8" Clamp-On Valve Cover Breather - No Shield

620-70154

1-3/8" Clamp-On Valve Cover Breather - No Shield (Each)

These breathers feature maximum flow and protection from airborne elements. They are used on most Hardin Marine valve cover systems. The breather is washable providing for easy maintenance.


1-3/8" Filtered Breather w/Shield
Your Price:
$21.99

1-3/8" Filtered Breather w/Shield

620-70155

1-3/8" Filtered Breather w/Shield (each)

Hardin’s breathers feature maximum flow and protection from airborne elements. They are used on most Hardin Marine valve cover systems. These breathers are easily washable for service.


Push In Chrome Breather, 1" Neck
Your Price:
$9.99

Push In Chrome Breather, 1" Neck

620-70150

Push In Chrome Breather, 1" Neck

Push-In Filtered Valve Cover Breather - No Shield
Your Price:
$19.99

Push-In Filtered Valve Cover Breather - No Shield

620-70151

Push-In Filtered Valve Cover Breather - No Shield (Each)

These breathers feature maximum flow and protection from airborne elements. They are used on most Hardin Marine valve cover systems. The breather is washable providing for easy maintenance.


Push-In Filtered Valve Cover Breather With Chrome Shield
Your Price:
$21.99

Push-In Filtered Valve Cover Breather With Chrome Shield

620-70152

Push-In Filtered Valve Cover Breather With Chrome Shield (Each)

These breathers feature maximum flow and protection from airborne elements.  They are used on most Hardin Marine valve cover systems.  The breather is washable providing for easy maintenance.


4" Tall Aluminum Valve Cover Breather
Your Price:
$59.99

4" Tall Aluminum Valve Cover Breather

620-45757

4" Tall Aluminum Valve Cover Breather (Each)

  • 4" Length
  • 3-5/16" Base Width

These breathers are designed to mount to the top of the valve cover with no bolts exposed. Each breather is highly polished.


Billet Aluminum Valve Cover Breather
Your Price:
$59.99

Billet Aluminum Valve Cover Breather

620-45759

Billet Aluminum Valve Cover Breather

These billet aluminum valve cover breathers are so nice they could be jewelry for your engine. Each breather is precision machined from solid billet aluminum. They are height matched with dense foam packing and work well to keep blow by to a minimum. Valve cover breathers contain an effective filter which traps oil vapor and prevents engine compartment contamination. Universal design fits any 1-1/4" diameter valve cover hole.

  • 2.25" bolt spread.
  • 1.75" x 3.0" base.
  • 4.25" tall.


Burn Down Valve Cover Breather
Your Price:
$64.99

Burn Down Valve Cover Breather

620-45758

Burn Down Valve Cover Breather (Each)

The baffled burn down style breathers got their name because they aretraditionally used to route crankcase pressure to the exhaust system.Today they are commonly used to route to a puke tank. These breathersfeature a -16 AN thread for ease of plumbing. Fittings are sold separately.

  • 3.875" bolt spread.
  • 1.75" base width.
  • 4.5" tall.


Extreme Aluminum Valve Cover Breather
Your Price:
$57.99

Extreme Aluminum Valve Cover Breather

620-45760

  • Polished Cast Aluminum 
  • Dual internal baffles Breather is sloped to match the styling of the valve cover 
  • Base measures 3-1/4" Long X 2" Wide with 2-3/8 Bolt Center to Center 
  • Breather measures 4" tall. 
  • Breather opening measures 1-3/4" Long x 1-1/4 Wide

Short Aluminum Valve Cover Breather - 2-3/4" Tall
Your Price:
$47.99

Short Aluminum Valve Cover Breather - 2-3/4" Tall

620-45756

Short Aluminum Valve Cover Breather - 2-3/4" Tall (Each)

  • 2-3/4" Length
  • 3-3/8" Base Width

These breathers are designed to mount to the top of the valve cover with no bolts exposed. Each breather is highly polished.


Push-In Breather with Billet Top, No Shield
Your Price:
$29.99

Push-In Breather with Billet Top, No Shield

620-70166

Push-In Breather with Billet Top, No Shield

Hardin’s breathers featuremaximum flow and protection from airborne elements. They are used on most HardinMarine valve cover systems. These breathers are easily washable for service.

  • 1" grommet
  • 1.75" tall
  • 2.5" outer diameter


Push-In Breather With Vent
Your Price:
$15.99

Push-In Breather With Vent

620-70160

Push-In Breather With Vent

These popular breathers are used when you would like to vent the crankcase to another location such as the flame arrestor or a vac-u-pan. This unit is used on many MerCruiser hi-performance applications. The push in has a 1" hole and a 5/8" vent hook-up.


1-3/8" Dual Baffle Weld-In Breather Extension
Your Price:
$15.99

1-3/8" Dual Baffle Weld-In Breather Extension

620-68802

1-3/8" Dual Baffle Weld-In Breather Extension

Made from Aluminum.

Length: 3.00"


5/8" x 3/4" Valve Cover Vent Extension
Your Price:
$4.95

5/8" x 3/4" Valve Cover Vent Extension

620-70182

5/8" x 3/4" Valve Cover Vent Extension

This gold irridited valve cover vent extension is commonly used to vent crankcase emissions to your flame arrestor.


Air Filter Assembly Vent, Black
Your Price:
$29.99

Air Filter Assembly Vent, Black

620-70162

Air Filter Assembly Vent, Black Plastic, 1-1/2" Inlet Diameter, 3-1/2" Height, Threaded End, Sold Individually

Vent your air cleaner.

These K&N air filter assembly vents are specifically designed for venting air out of the side of your air cleaner. They are available in different inlet sizes and materials, based on what you need for your application. Removable baffle included inside extension


Breather Extension
Your Price:
$34.99

Breather Extension

620-154022

Valve Cover Accessories - Breather Extension (2 Required)

  • The caps and extensions are CNC machined from billet aluminum and both seal with an O-ring.
  • 16 male thread to valve cover.
  • 1" NPT female into top of breather.


Pan E-vac System
Your Price:
$41.99

Pan E-vac System

655-6002

Pan E-vac System

Designed primarily for drag and circle racing. This system is designed to reduce pressure build-up in the engine crankcase and to reduce oil leaks, while increasing engine performance. Track and dyno tests show significant horsepower increases.

    Includes 2 each:
  • oil separators/breathers
  • breather/filler cap
  • grommets
  • one-way check valve and weld-in nipple for header collector.
Note: Not recommended with mufflers.