Flatline 2-Into-1 Performance Exhaust for Harley-Davidson Sportster (1986–2022+)

Flatline 2-Into-1 Performance Exhaust for Harley-Davidson Sportster (1986–2022+)

$500.00
The Flatline Sportster Exhaust is engineered for riders who want a sleek, straight-line exhaust design without sacrificing performance. Its 0-degree linear layout creates a clean, modern look while the 2-into-1 collector boosts exhaust velocity for increased horsepower, torque, and throttle response.
Kinetic Motorcycles

2-1 Details

For O2 Bungs

Choose Exhaust Tip Options. PLEASE READ:If you selected "No" on the previous menu, you will get straight default tips.

USA Designed & Made
Worldwide Shipping
High Precision Motorcycle Parts
Product Information

The Flatline Sportster Exhaust is engineered for riders who want a sharp, linear design without sacrificing performance.

Its 0-degree layout creates a clean, modern profile while the 2-into-1 collector improves exhaust velocity for stronger horsepower, torque, and throttle response.

Handcrafted from mandrel-bent 304 stainless steel and fully TIG welded, the Flatline is lightweight, corrosion-resistant, and built for long-term durability.

Internally ceramic-coated tubing reduces radiant heat and stabilizes performance. Riders can tune sound output with an optional fiberglass-wrapped internal baffle.

EFI models can run optional O2 bungs, and the integrated flange kit eliminates OEM snap-ring flanges for a simpler, stronger installation.

Specifications
Material
Mandrel-bent 304 stainless steel, TIG welded
Coating
Internal ceramic coating
Diameter
1.75" at flange → stepped to 2"
Baffle
Optional fiberglass-wrapped internal baffle
Tip Options
45°, 90°, slash, teardrop, straight
O2 Sensor Bungs
Optional (EFI 2007–2022+)
Flange Kit
Integrated — no OEM snap rings
Production Time
2–4 weeks (made to order)
Features
  • Linear 0-degree design for a clean, modern aesthetic
  • 2-into-1 collector increases horsepower and throttle response
  • Hand-TIG-welded 304 stainless steel construction
  • Internally ceramic-coated to reduce heat exposure
  • Optional fiberglass-wrapped baffle for sound tuning
  • Customizable exhaust tip styles
  • Integrated flange kit simplifies installation
  • Compatible with EFI and carbureted Sportsters
Fitment
Iron 883
Nightster
Forty-Eight
Seventy-Two
Roadster
1200 Custom
Fitment Details:
  • Fits Harley-Davidson Sportster models (1986–2022+)
  • Works with mid-controls, forward-controls, and rearsets
  • All 883 & 1200 variants supported
  • EFI bikes require O2 bungs unless using eliminators
  • Note: Straight rearward design is not passenger-friendly
Why Choose
Sleek straight-line design with modern styling
2-into-1 performance collector for stronger power delivery
Internal ceramic coating improves heat management
Optional baffle lets riders fine-tune sound output
Durable stainless steel handcrafted construction
Clean installation with integrated flange system
FAQs
Will this exhaust fit my Sportster?

Yes, the Flatline fits all Harley-Davidson Sportster models from 1986–2022+.

Do I need O2 bungs?

EFI models (2007–2022+) require O2 bungs unless using O2 eliminators.

What tip options can I choose?

45°, 90°, slash cut, teardrop, or straight.

Does this exhaust come with a baffle?

A fiberglass-wrapped internal baffle is available as an option.

How long is production time?

Typical turnaround time is 2–4 weeks.

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

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