KTM · PowerParts · Exhaust systems
The KTM FMF Factory 4.1 RCT Silencer is a KTM PowerParts upgrade designed for 4-stroke offroad exhaust systems, built to deliver a noticeable performance enhancement along with significantly more torque. Finished in Grey, it focuses on improving power delivery while also targeting substantial weight saving for riders who want a more responsive feel on track or trail.
This silencer (part number A46005981003) features a silencer housing made of high-grade aluminum and a carbon silencer cap. It can be mounted with the original header, making it a practical choice for riders who want performance gains without changing the entire system. Listed approvals and notices shown on the page apply.
Construction
The silencer housing is made of high-grade aluminum to support a substantial weight saving while keeping the construction focused on offroad use. The reduced weight helps the bike feel more agile without losing the core function of a performance exhaust component.
Performance
A carbon silencer cap adds a premium, performance-oriented detail to the Factory 4.1 RCT design. Combined with the rest of the silencer construction, it supports the goal of noticeable performance enhancement in a compact, purpose-built package.
Installation
Installation flexibility is built in, with mounting also possible using the original header. This allows riders to upgrade the silencer while keeping their existing header setup, simplifying the path to improved torque and a more performance-focused exhaust configuration.
Performance
The FMF Factory 4.1 RCT Silencer is engineered to provide significantly more torque and a noticeable performance enhancement for 4-stroke offroad riding. The result is a stronger, more responsive character designed for riders who prioritize improved drive and acceleration feel from their exhaust setup. For model fitment, refer to the compatibility information shown on the page, as this silencer is listed for specific KTM motorcycles.
| Part Number | A46005981003 |
|---|---|
| Product Line | KTM PowerParts |
| Category | Exhaust systems > 4-stroke Offroad |
| Colour | Grey |
| Materials | Carbon, Stainless steel |
| Approvals | AMA Amateur, FIM, CCCUO |
| Model — Model Years |
|---|
| 250 EXC-F — 2024–2027 |
| 250 EXC-F 6DAYS — 2027 |
| 250 EXC-F 6Days — 2026 |
| 250 EXC-F Champion Edition — 2025 |
| 250 EXC-F Six Days — 2024–2025 |
| 250 SX-F — 2023–2027 |
| 250 SX-F Adamo Edition — 2025 |
| 250 SX-F Factory Edition — 2022, 2024–2026 |
| 250 XC-F — 2023–2027 |
| 350 EXC-F — 2024–2027 |
| 350 EXC-F 6DAYS — 2027 |
| 350 EXC-F 6Days — 2026 |
| 350 EXC-F Champion Edition — 2025 |
| 350 EXC-F Six Days — 2024–2025 |
| 350 SX-F — 2023–2027 |
| 350 XC-F — 2023–2025, 2027 |
| 350 XC-F Factory Edition — 2023–2026 |
Vehicle compatibility as captured from KTM for article number A46005981003.
KTM approval notice: AMA Amateur racing sound compliant.
KTM approval notice: Closed Course Competition Use Only.
KTM approval notice: FIM Pro racing sound compliant.
