VAT (Vent-to-Atmosphere Breather) Bolts for Harley Evolution Engines

$45.00

Upgrade your breather setup with Kinetic’s VAT Breather Bolts—precision CNC-milled from aluminum and designed to vent crankcase pressure directly to the atmosphere for improved engine breathing.

These bolts feature an integrated removable mesh screen, held in place by a built-in snap ring. This allows for easy maintenance and the option to run open breathers or swap mesh screens. Finished in anodized black for durability and a stealth aesthetic, the VAT bolts are a stylish and functional addition to any Harley Evolution engine build.

Whether you're refining performance or chasing that raw, open-breather look, these are the perfect finishing touch.

Specifications:

  • Type: Vent-to-atmosphere breather bolts

  • Material: CNC-milled aluminum

  • Finish: Anodized black

  • Mesh: Integrated mesh screen with snap ring for easy removal

  • Mounting: Direct bolt-in replacement

  • Sold As: Pair (2 breather bolts)

  • Country of Origin: Made in USA

Upgrade your breather setup with Kinetic’s VAT Breather Bolts—precision CNC-milled from aluminum and designed to vent crankcase pressure directly to the atmosphere for improved engine breathing.

These bolts feature an integrated removable mesh screen, held in place by a built-in snap ring. This allows for easy maintenance and the option to run open breathers or swap mesh screens. Finished in anodized black for durability and a stealth aesthetic, the VAT bolts are a stylish and functional addition to any Harley Evolution engine build.

Whether you're refining performance or chasing that raw, open-breather look, these are the perfect finishing touch.

Specifications:

  • Type: Vent-to-atmosphere breather bolts

  • Material: CNC-milled aluminum

  • Finish: Anodized black

  • Mesh: Integrated mesh screen with snap ring for easy removal

  • Mounting: Direct bolt-in replacement

  • Sold As: Pair (2 breather bolts)

  • Country of Origin: Made in USA

Fitment:

  • Designed to fit all Harley-Davidson Evolution engines from 1986–2022, including Sportster and Big Twin models that use breather bolts.

Why Choose the VAT Breather Bolts?

  • Allows crankcase pressure to vent freely to the atmosphere

  • CNC-milled aluminum for durability and precision

  • Mesh screen filters vapor while maintaining airflow

  • Snap-ring design makes cleaning and maintenance easy

  • Anodized black finish resists corrosion and complements blacked-out builds

  • Direct fit for most Evo-based Harley models

FAQs:

Q: What does VAT stand for?

A: VAT stands for Vent-To-Atmosphere, meaning the crankcase pressure is released directly into the air rather than recirculated through the intake.

Q: Will these fit my 2003 Sportster?

A: Yes—these breather bolts fit all Evolution engines from 1986–2022, including Sportsters.

Q: Are the mesh screens removable?

A: Yes—the mesh is secured with built-in snap rings, allowing for easy removal or replacement.

Q: Do these require any additional hardware?

A: No—all components are built in. Simply replace your stock breather bolts with these.

Q: Can I use these with aftermarket air cleaners?

A: Absolutely—just ensure the air cleaner does not require internally routed breather hoses, as these vent externally.