VAT Breather Bolts for Harley Evolution Engines

VAT Breather Bolts for Harley Evolution Engines

SPORTSTER
$45.00
Kinetic VAT Breather Bolts are vent-to-atmosphere breather bolts for Harley Evolution engines, CNC-milled from aluminum with a removable mesh screen and anodized black finish for improved crankcase ventilation and clean bolt-on installation.
Kinetic Motorcycles
USA Designed & Made
Worldwide Shipping
High Precision Motorcycle Parts
Product Information

The Kinetic VAT (Vent-to-Atmosphere) Breather Bolts are engineered for riders who want freer engine breathing and a stripped-down, performance-focused setup.

By venting crankcase pressure directly to the atmosphere, these bolts eliminate restrictive internal routing and help stabilize engine operation under load.

Precision CNC-milled from aluminum, each bolt features an integrated, removable mesh screen secured by a snap ring — making maintenance fast and flexible.

Run them as-is for filtered venting, clean the mesh in seconds, or configure for an open-breather look.

Finished in durable anodized black, they’re built to perform and look right at home on blacked-out or custom Evolution builds.

Specifications
Type
Vent-to-Atmosphere Breather Bolts
Material
CNC-Milled Aluminum
Finish
Anodized Black
Mesh
Removable Mesh Screen with Snap Ring
Mounting
Direct Bolt-In Replacement
Quantity
Sold as a Pair (2 Bolts)
Country of Origin
Made in USA
Features
  • Vent-to-atmosphere design improves crankcase breathing
  • CNC aluminum construction for precision and durability
  • Removable mesh screen filters vapor while maintaining airflow
  • Snap-ring retention for quick maintenance access
  • Anodized black finish resists corrosion and complements custom builds
  • Direct bolt-on fitment with no additional hardware required
  • Cleaner engine bay and more aggressive mechanical appearance
Fitment
Engine Compatibility
Harley-Davidson Evolution Engines (1986–2022)
Model Types
Sportster and Big Twin with Breather Bolt Setup
Build Style
External or Open-Breather Configurations
Installation
Direct Replacement for Stock Breather Bolts
Why Choose
Improved crankcase ventilation
Precision CNC machining
Serviceable mesh design
Clean, performance-focused appearance
Corrosion-resistant anodized finish
Made in the USA
FAQs
What does VAT stand for?

VAT means Vent-To-Atmosphere — crankcase pressure is released directly into the air instead of being recirculated.

Will these fit a 2003 Sportster?

Yes. They fit all Evolution engines from 1986–2022, including Sportsters.

Are the mesh screens removable?

Yes. Each bolt uses a snap ring to retain the mesh for easy removal and cleaning.

Do I need extra hardware?

No. Simply replace your stock breather bolts.

Can I use these with aftermarket air cleaners?

Yes, as long as the air cleaner does not require internally routed breather hoses.

Designed & Built in the USA

Every Kinetic product is designed and manufactured in the United States. Keeping our work in-house allows us to control quality, refine fitment, and stand behind every part we make.

A Decade of Hands-On Experience

Founded in 2013. A decade of machining, installing, riding and refining components on real bikes — not just in a lab. That experience shows in the quality of every part we ship.

Designed by Riders & Builders

Every product is shaped by hands-on building and riding experience, with practical decisions made where it matters most.

Innovation Meets Passion

Made in the USA

Founded in 2013 by Mike Le, Kinetic Motorcycles was built on a simple belief: motorcycle parts aren't generic hardware — they're personal. Every product begins as an original idea, designed by Mike and developed entirely in-house.

We don't rely on templates or outsourced shortcuts. Each part is shipped by hands-on fabrication experience and time spent riding, testing, and refining. Whether you're dialing in a daily rider or building something truly your own, our focus is the same — create parts that feel intentional, functional, and worthy of your motorcycle.

Innovation Meets Passion

What Our Customers Say

Really happy with the product. Took a while to get my order but they were out of the spark plug cables I ordered. I had to email and inquire what the deal was. They were super helpful once I initiated communication. Would have been cool to get some swag or something since they took so long. But the relocator is great. I really love it. And they responded promptly once I reached out to them. Their customer service is truly fantastic.

Brian Hopkins
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I had some questions on some bars, so I DMd them on Instagram. The dude I talked to was super helpful. I purchased the shirt because of his response. I’ll rep the brand due to the customer service.

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