Offenhauser 4039 Breather


4 in stock


Material Type: Aluminum
Finish: Polished
MFG. Part #: 4039
Sold in Quantity: Each
Overall Height: 4.50″
Attachment Style: Bolt-on

This Offenhauser valve cover breathers’ superior baffle design insures open air passages at all times – no oil leakage even at extremely high rpm’s. It’s made of polished cast aluminum and is 5″ tall. The base measures 1-3/4″ x 4-3/4″.  The top of this breather is NOT removeable.  Breather includes a lower baffle plate in addition to featuring internal layer type baffle where one plate is over the other.  It allows the air to breath, but keeps the oil baffled below.

Includes gasket, bolts and mounting hole template.


  • Lid is NOT removeable
  • Bolt Hole Centers:  4.00″
  • Overall Height:  4.50″
  • Base:  1-3/4″ x 4-3/4″

Additional information

Weight 3 lbs



Offenhauser Intakes, Manifolds, Valve Covers, Heads, and More!

White Owl Speed is the newest distributor for Offenhauser. We have exclusive merchandise and parts that have not been available for 60 years! We are constantly listing new parts and making new inventory available so make sure you check back often! Offenhauser was established in 1946 by Fred C. Offenhauser and Fran Hernandez. All of Offenhauser's parts are cast and machined in California. All Offenhauser parts are forged using a hand-carved wooden pattern at Bell foundry in South Gate, California and machined at the Offenhauser Shop In Downtown Los Angeles. Offenhauser is one of the oldest premium automotive parts manufacturers in the world operating for over 70+ years continuously.


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