Calvana Round Push-In Valve Cover Breather — 2-Pack Chrome 1in Neck, Grommet Seal

Calvana's 2-pack round push-in breather is a chrome-plated valve cover vent with a 1" neck and rubber grommet designed to fit 1-1/4" holes and keep oil out while allowing crankcase ventilation.

These breathers replace or upgrade stock vents on small-block and big-block Chevy engines, Ford SBFs, and other V8 valve covers that use a 1-1/4" hole. Built from stamped steel with a triple chrome finish and supplied with snug rubber grommets, the pair gives a tidy appearance and reliable sealing under normal driving conditions. They are simple to install and suitable for street engines where a push-in style breather is preferred over baffled or PCV systems.

How does this breather help keep oil from splashing out?

The Calvana breather includes an internal baffle that redirects crankcase gases while limiting oil carryover. The design reduces the amount of oil that can be thrown up against the vent opening during acceleration or cornering, protecting the engine bay and intake area from oily deposits.

• Internal baffle minimizes oil droplets exiting the valve cover
• 1" neck size matches the included grommet for a leak-resistant seal
• Push-in fit prevents rotation and movement during operation

Will these breathers fit my engine's valve cover hole?

Yes, they are made for valve covers that have a 1-1/4" hole diameter and use a 1" outside-diameter neck breather. That makes them suitable for many small-block and big-block Chevy applications and compatible with some Ford SBFs when the hole size matches. Always measure your valve cover hole and neck clearance before ordering to confirm fitment.

• Fits 1-1/4" valve cover hole openings
• 1" neck outside diameter matches the supplied grommet
• Common compatibility: SBC, BBC, SBF, and engines like 327, 350, 302, 454, 502

How difficult is installation and what tools are needed?

Installation is straightforward and typically requires no special tools: clean the mounting hole, lubricate the grommet slightly with oil, and press the breather into place by hand. The snug rubber grommet and round push-in design hold the unit securely; only light pressure is necessary. For tight spaces you may use pliers with a cloth to avoid scratching the chrome finish.

• Recommended: clean rag, small amount of engine oil for lubrication
• Hand-press installation; optional padded pliers for tight fits
• No drilling required if your valve cover already has the correct hole size

What materials and finish does this breather use, and how durable is it?

The breather body is formed from steel and completed with a triple chrome plating that resists corrosion and cleans easily. The rubber grommet provides a flexible seal that reduces vibration transfer and prolongs fitment life. While well-suited for daily drivers and show cars, ensure it matches your vehicle’s ventilation needs if you run high-performance or forced-induction setups that require dedicated PCV plumbing.

• Stamped steel body with triple chrome plating for corrosion resistance
• Durable rubber grommet included for a tight, vibration-resistant fit
• 3" outer diameter face and 1" neck dimension for stable seating

Who is this for: This Calvana 2-pack is ideal for car enthusiasts restoring or upgrading classic V8 valve covers, hot-rodders seeking a clean engine-bay appearance, and everyday drivers maintaining reliable crankcase ventilation on SBC, BBC, SBF, and similar engines. It’s not a replacement for a closed PCV system on high-boost or race engines; instead, choose these breathers for straightforward venting and improved looks on street and mild-performance builds.