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.
SLOT21 Carbon-Fiber Intake System for M8 Harley-Davidson Softail
$215.00
The SLOT21 is a lightweight carbon-fiber composite intake system for Milwaukee-8 Softails, featuring a 21-slot multidirectional airflow face, internal oil passages, and a KM-378 reusable filter—all in a compact, rider-friendly design with complete bolt-on installation.
Kinetic Motorcycles
USA Designed & Made
Worldwide Shipping
High Precision Motorcycle Parts
Product Information
The SLOT21 is engineered as a minimal, high-flow intake solution for Milwaukee-8 Softails, replacing the bulky OEM air cleaner with a compact carbon-fiber composite assembly.
Its 21-slot face provides multidirectional airflow, improving engine breathing and throttle response while maintaining a sleek, low-profile appearance that won’t interfere with knees, tank bags, or accessories.
Internally routed oil passages ensure proper circulation, while the KM-378 reusable air filter provides consistent performance and simple long-term maintenance.
Each SLOT21 kit includes all required gaskets and mounting hardware, allowing for straightforward bolt-on installation using the factory backplate.
Designed and assembled in Houston, this intake delivers both performance and aesthetic refinement for modern Softail builds.
Specifications
Material
Carbon-fiber composite
Face Design
21-slot multidirectional airflow
Filter
KM-378 reusable performance filter
Oil Management
Internal oil circulation channels
Mount Type
Bolt-on to OEM backplate
Finish
Matte carbon-fiber texture
Included
Intake assembly, gaskets, mounting hardware
Manufactured In
USA (assembled in Houston)
Features
- High-flow 21-slot design improves engine breathing
- Compact footprint for better ergonomic clearance
- Lightweight carbon-fiber composite construction
- Internal oil passages for proper M8 crankcase routing
- Reusable KM-378 filter for long-term performance
- Complete bolt-on kit with gaskets and hardware included
- Designed specifically for Milwaukee-8 Softail platforms
Fitment
Heritage Classic
Breakout
Deluxe
Fat Bob
Fat Boy
Low Rider
Slim
Street Bob
Standard
Sport Glide
FXDR 114
Fitment Details:
- Fits all Harley-Davidson Milwaukee-8 Softail models (2018+)
- Mounts directly to OEM backplate
- No modification required
Why Choose
Compact high-flow alternative to bulky OEM intake
Carbon-fiber composite for lightweight durability
21-slot face for multidirectional airflow efficiency
Reusable performance filter reduces maintenance costs
Internal oil routing designed for M8 platform
Simple bolt-on installation with included hardware
FAQs
Will the SLOT21 fit my 2019 Heritage Classic 114?
Yes, it fits all Milwaukee-8 Softail models from 2018 onward.
Can I use a different air filter?
The SLOT21 is designed specifically for the KM-378 filter for correct fit and sealing.
Is installation difficult?
No. It installs directly onto the OEM backplate using the included gaskets and hardware.
Does it improve airflow and performance?
Yes. The 21-slot multidirectional design improves intake efficiency and throttle response over stock.
Does it include internal oil routing?
Yes, internal oil passageways are built into the intake for proper crankcase ventilation.
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.
What Our Customers Say
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.
Precision-machined and bolt-on perfect. Took 30 minutes to install and the difference is night and day.
Customer support answered my DMs within an hour. Shipping was on point, packaging was premium.
Customer Reviews
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