Shorty 2-1 Full System to suit Harley Davidson Softail Fatboy / Breakout (18-19) FXDR (19-22)

The Two Brothers Racing Comp-S 2-1 is a complete stainless steel full system for Harley-Davidson Softail Breakout, Fat Boy and FXDR models, finished in ceramic black and topped with a carbon fibre end cap. The classic 2-1 cone layout is paired with stepped headers, so the focus is on a broad torque increase through the midrange rather than peak-only gains.

It suits riders who want a hand-built, race-bred system that changes both the sound and the stance of the bike. The swept-up muffler lifts ground clearance, the system clears both forward and mid controls, and heat shields are supplied as part of the kit.

Tuning flexibility is built in: the system accepts the standard 12mm O2 sensors as well as 18mm aftermarket wideband sensors, so it works with the mapping setup you already run. A fuel management or tuning solution is recommended to get the most from the system.

• Comp-S 2-1 full system with classic cone muffler and carbon fibre end cap
• Ceramic black finish over mandrel-bent stainless steel tubing
• Stepped headers for an immediate power gain, with a significant torque increase from the 2-1 design
• Dyno tuned for maximum performance
• Swept-up muffler for improved ground clearance
• All TIG welding done by hand
• High-temp stainless steel wool and packing material
• Accepts stock 12mm O2 sensors and 18mm aftermarket wideband sensors
• Clears both forward and mid controls
• Heat shields included (not shown on bike in product images)
• Approximately 17lb (7.7kg) of weight savings over stock
• Made in the USA at Two Brothers Racing's Santa Ana, California facility

• Comp-S 2-1 full exhaust system with carbon fibre end cap
• Heat shields

Confirm fitment before installation — this system suits Softail Breakout and Fat Boy (2018 onwards) and FXDR (2019 onwards) with the 240-section rear tyre only.
Install on a completely cold engine, and fit the heat shields as supplied before the first start.
Handle the pipes with clean gloves during installation; fingerprints and oils can bake permanently into the ceramic black finish on the first heat cycle.
Retain and refit your O2 sensors — the system takes the stock 12mm sensors, or 18mm wideband sensors if you are running a tuning setup.
Have the bike re-tuned or remapped after fitting a full system so the fuelling matches the new flow; running the stock map can leave the engine lean.
Leave all fasteners and clamps finger-tight until the whole system is hung and aligned, then tighten from the head pipes back to the muffler.
Re-check the clamps and mounting fasteners after the first few heat cycles and periodically thereafter, as exhaust hardware can settle and loosen with vibration.
Let the system cool fully before washing. Clean with warm water and a mild automotive soap, then dry thoroughly to prevent water sitting in the packing.
Avoid abrasive pads, polishes, degreasers and solvents on the ceramic black coating and the carbon fibre end cap; a soft cloth and mild soap are enough.
Rinse the system after riding in wet, coastal or salted conditions to limit corrosion around welds and fasteners.
Avoid prolonged idling and avoid pressure-washing directly into the muffler outlet, which can displace the internal packing.
If the exhaust note becomes noticeably louder or raspier over time, have the internal packing inspected and replaced as required.