FMF - Fatty Pipe (KTM)

FMF – Fatty Pipe (KTM)

The FMF Fatty Pipe is the one that started it all — the most copied two-stroke pipe in the world, and for good reason. FMF designed the Fatty to give KTM riders more usable power everywhere — stronger pull off the bottom, a smoother mid-range hit, and clean rev-out up top. Whether you’re racing, trail riding, or just spinning laps on the weekend, this pipe makes your bike feel more responsive and easier to ride.

Every Fatty Pipe is computer-designed and dyno-tested for your exact model, so the gains are real. It’s built from sturdy 19-gauge U.S. steel using FMF’s Tru-Flo stamping process for perfect fit and maximum flow. The nickel-plated finish not only keeps it looking factory clean but also protects against rust and makes wash-ups easy. O-rings are included, and it works perfectly with your stock or FMF silencer.

Why We Like It:
The Fatty just works — it makes your KTM smoother, faster, and more fun to ride without changing the bike’s personality. You feel more torque when you roll on the throttle and a clean pull through every gear. It’s the kind of upgrade that makes the whole bike feel more refined.

Why It’ll Work for You:
This pipe helps your engine run stronger and cleaner across the whole powerband. You’ll get better throttle control in tight sections, more drive out of corners, and a more forgiving hit that’s easier to manage. The nickel finish keeps it looking sharp and easy to maintain, even after rough rides. Bolt it on, ride it hard, and it’ll keep performing season after season.

Variants / Options:
Fits most KTM two-stroke models. Compatible with FMF and stock silencers (unless otherwise noted).

Key Features:

• Increases power and torque across the entire rpm range
  
  

• Smoother, more controllable throttle response
  
  

• 19-gauge U.S. carbon steel construction for strength
  
  

• Nickel-plated finish resists rust and cleans easily
  
  

• Tru-Flo stamping process ensures perfect fit and flow
  
  

• Works with FMF or stock silencers
  
  

• Includes O-rings for easy installation