Calvana Round Push-In Oil Breather 2-Pack — 1" Neck for 1-1/4" Valve Cover, Triple-Chrome, Internal Baffle

These two Calvana round push-in oil breathers with 1" necks and rubber grommets seal 1-1/4" valve cover holes while allowing reliable crankcase venting.

If you need a straightforward, durable breather for classic small- or big-block Chevy and Ford engines, this 2-pack from Calvana offers a simple replacement or upgrade. Each breather has a 1" outside-diameter neck that fits the included rubber grommet, a 3" flange to rest on the valve cover, an internal baffle to reduce oil splash, and a triple-chrome-plated steel finish for corrosion resistance and a polished engine-bay appearance.

How does this breather control oil splash while venting pressure?

The Calvana breather uses an internal baffle that directs airflow while breaking up oil droplets before they can escape into the engine bay. That design balances open venting with splash reduction so crankcase gases can exit without leaving excess oil on valve covers.

• Internal baffle reduces oil carryover into the air stream
• Open-top design eases crankcase pressure release
• Grommeted neck creates a positive seal to limit leaks
• Triple chrome plating resists corrosion and oil staining

Will this fit my valve cover and which engines are compatible?

These breathers are built for valve covers that have a 1-1/4" diameter hole; the neck measures 1" outside diameter and is paired with a rubber grommet for a tight push-in fit. They are commonly used on a variety of Chevy and Ford small-block and big-block applications as direct-fit replacements or as aftermarket upgrades.

• Designed for 1-1/4" valve cover openings
• Commonly compatible with SBC, BBC, SBF series engines
• Works with popular displacements like 302, 327, 350, 454, 502
• Includes grommet to adapt the 1" neck to the 1-1/4" hole

How do I install these push-in breathers and ensure a secure fit?

Installation is straightforward: seat the rubber grommet into the valve cover hole, then push the breather neck into the grommet until the flange rests against the cover. For a firmer seal and easier assembly, a light film of engine oil on the grommet helps; no special tools are required for typical installs.

• Press grommet into 1-1/4" hole until flush
• Lubricate grommet with light oil for smoother fit
• Push breather neck into grommet until flange seats
• Ensure breather is snug and does not rotate under vibration

What materials and durability features does this breather offer?

Calvana builds these breathers from steel and applies a triple chrome plating for enhanced surface strength and an attractive finish. The metal construction stands up to under-hood heat and contaminants better than cheap plastic alternatives, while the rubber grommet provides vibration isolation and a lasting seal.

• Steel body with triple chrome plating for longevity
• Rubber grommet resists tear and absorbs vibration
• Simple push-in design minimizes maintenance needs
• Two-breathers per pack for multiple covers or spares

Who is this for: This 2-pack is aimed at DIY mechanics restoring or maintaining classic American V8s, performance enthusiasts upgrading engine-bay hardware, and anyone who needs a reliable, attractive breather for valve covers with a 1-1/4" hole. It’s particularly useful when you want a quick, tool-free installation with a durable metal finish and a grommeted seal.