Solid Series Brass Air Cleaner – High-Flow Intake System for Harley-Davidson Sportster

Solid Series Brass Air Cleaner – High-Flow Intake System for Harley-Davidson Sportster

$275.00
The Solid Series Brass Air Cleaner is a high-flow motorcycle intake system built for Harley-Davidson Sportster riders who want improved airflow, crisp throttle response, and bold all-metal styling. Precision-machined from solid brass with an aluminum backing plate, this performance intake system delivers reliable breathing without hoses, clutter, or compromises. Designed for CV-carbureted and EFI Sportsters, it’s the perfect upgrade for clean custom builds and everyday riding.
Kinetic Motorcycles
USA Designed & Made
Worldwide Shipping
High Precision Motorcycle Parts
Product Information

The Solid Series Brass Air Cleaner is engineered for riders who demand both performance and visual impact from their intake system.

This high-flow intake improves airflow efficiency, supporting sharper throttle response and smoother power delivery across the RPM range.

Precision-machined from solid brass and paired with an anodized aluminum backing plate, the intake develops a natural patina over time—making each unit visually unique.

Internal crankcase ventilation eliminates external breather hoses, creating a clean, minimalist installation ideal for custom Sportster builds.

Proudly made in the USA, this intake system is built for long-term durability, easy maintenance, and confident everyday riding.

Specifications
Material
Solid brass cover + anodized aluminum backing plate
Finish
Natural brass (develops patina)
Diameter
4.25″
Depth
2.5″
Filter
KM-378R washable & reusable high-flow element
Breather Design
Internal ventilation — no external hoses
Mounting
Complete bolt-on system with hardware & gaskets
Compatibility
CV-carbureted & EFI Sportsters
Manufactured In
USA
Features
  • High-flow intake improves airflow and throttle response
  • Solid brass construction delivers durability and custom styling
  • Reusable KM-378R filter lowers long-term maintenance cost
  • Internal breather design removes external hoses
  • Precision-machined aluminum backing plate ensures correct fit
  • Minimalist all-metal design complements custom builds
  • Built for daily riding and long-term performance
Fitment
Harley-Davidson Sportster (2004–Present)
CV-carbureted Sportsters
EFI Sportster models
Stock & aftermarket backing plates
No breather hoses required
Why Choose
Improves engine breathing and throttle response
Clean installation with no breather hose clutter
Solid brass design ages with a natural patina
Reusable filter for lower lifetime cost
Engineered and made in the USA
FAQs
Will this fit my Sportster?

Yes. Compatible with 2004+ Sportsters including CV-carbureted and EFI models.

Do I need breather hoses?

No. The intake vents internally through the filter.

How often should the filter be serviced?

Every 5,000–10,000 miles depending on riding conditions.

Can this be used on EFI models?

Yes. Proper tuning is recommended after installation.

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
Ignition Coils Relocator (L.E.) Relocator for Harley-Davidson Sportster

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.

Chet Michaelsen
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Precision-machined and bolt-on perfect. Took 30 minutes to install and the difference is night and day.

Samuel P.
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Customer support answered my DMs within an hour. Shipping was on point, packaging was premium.

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