Factory 4.1 RCT Exhaust Silencer 07-16 KTM Husaberg Husqvarna 250-530 - FMF 045558
Harnessing the latest in FMF Resonance Chamber Technology™ inside and out, the Factory 4.1 RCT Stainless SL Slip-On delivers massive power gains and notable weight savings. Designed with Factory Forward Engineering, the system brings the muffler closer to the motor for improved mass centralisation and is constructed from aerospace-grade materials. The sleek aluminium body, carbon end cap, and stainless midpipe deliver robust durability and a premium appearance. This exhaust is for closed course use only and incorporates the latest FMF Resonance Chamber Technology™. Its shorter overall length helps reduce crash damage. Features Factory Forward Engineering for centralised mass, and is manufactured from high-spec aerospace aluminium, carbon, and stainless steel. It offers massive power gains across the entire RPM range and significant weight savings of 4.4 lbs. Includes a Rapid Tuning System (RTS) for efficient set-up. The muffler has a natural aluminium finish with a carbon end cap. A 94 dB quiet insert and a spark arrestor (screen insert) are included. Made entirely in Southern California, USA. Item ID 045558. Type: Slip-On. Configuration: Single. Construction: Aluminium. Finish: Natural. Midpipe: Stainless Steel. Endcap: Carbon. Spark Arrestor: Screen insert (included). Quiet Insert: 94 dB (included). Weight: 4.4 lbs.
- SKU
- 06-1750.FMF.FAC
- Brand
- FMF Exhausts
- Availability
- In Stock (2)
FULL DESCRIPTION
FMF Factory 4.1 RCT Exhaust Silencer
Experience massive power gains and significant weight savings with the FMF Factory 4.1 RCT Stainless SL Slip-On exhaust silencer. This high-performance part utilizes FMF's latest Resonance Chamber Technology™ for enhanced power output across the entire RPM range.
Designed with Factory Forward Engineering, the muffler is positioned closer to the motor to improve mass centralization, contributing to better handling and performance. The construction employs aerospace-grade aluminum for the sleek body, a durable carbon fiber end cap, and a robust stainless steel midpipe, ensuring both premium appearance and exceptional longevity.
This system is manufactured entirely in FMF's California facility, reflecting a commitment to quality and performance. It is intended for closed course use only.
Key Features:
- Incorporates the latest FMF Resonance Chamber Technology™.
- Features Factory Forward Engineering for optimized mass centralization.
- Constructed from high-specification aerospace aluminum, carbon fiber, and stainless steel.
- Offers massive power gains throughout the entire RPM range.
- Provides significant weight savings of 4.4 lbs.
- Includes a Rapid Tuning System (RTS) for efficient setup.
- Comes with a natural aluminum muffler finish and a carbon end cap.
- Includes a 94 dB quiet insert for reduced noise levels.
- Spark arrestor (screen insert) is included for safety.
- Proudly manufactured entirely in Southern California, USA.
- Shorter overall length designed to reduce potential damage from impacts.
Specifications:
- Type: Slip-On
- Configuration: Single
- Muffler Construction: Aluminum
- Muffler Finish: Natural
- Midpipe Material: Stainless Steel
- End Cap Material: Carbon
- Weight: 4.4 lbs


