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