Fmf Factory 4.1 Slip-on Muffler
Fmf Factory 4.1 Slip-on Muffler
Available in stock (5)
-
Estimated delivery: Feb 04 - Feb 08
About this product
About this product
Unleash the true potential of your motorcycle with the FMF Factory 4.1 Slip-On Muffler. Experience the pinnacle of exhaust technology, engineered for superior power, enhanced handling, and unmatched sound. This muffler is meticulously crafted using premium American materials and innovative design, ensuring top-tier performance and durability.
Description
The FMF Factory 4.1 Slip-On Muffler delivers a significant boost in horsepower across the entire RPM range, giving you the competitive edge you need. Featuring FMF's exclusive Chamber Core technology, this muffler optimizes exhaust flow for maximum performance gains. Factory Forward Engineering centralizes mass, dramatically improving your bike's handling and responsiveness. Customize your exhaust with performance tuning inserts and a spark arrestor module for tailored performance. Built to meet AMA sound requirements on most models, this slip-on muffler is the perfect upgrade for riders seeking performance and quality. Its stainless steel construction and carbon fiber end cap guarantee lasting performance and a race-inspired look. Please note this muffler will not pass 2025 FIM sound regulations.
Features & highlights
- Experience superior power and performance with improved horsepower throughout the RPM range.
- Benefit from enhanced handling and responsiveness thanks to Factory Forward Engineering, which centralizes mass.
- Enjoy the durability and premium quality of American-made materials.
- Customize your exhaust with performance tuning inserts and a spark arrestor module (available separately).
- Meet AMA sound requirements on most models, ensuring compliance and responsible riding.
- Crafted with a lightweight design for optimum performance.
Technical specifications
- Brand: FMF
- Product Name: Muffler
- Type: Slip-On
- Material: Stainless Steel
- End Cap Material: Carbon Fiber
- Units: Each
Important to know
Please note: This muffler will not pass 2025 FIM sound regulations. Performance tuning inserts and spark arrestor module are available separately.
Shipping & Return
Shipping & Return
Free shipping to GLS parcel shop parcel box for purchases over DKK 1,000.
GLS home delivery costs DKK 59.
We do our best to ship your order as quickly as possible. All orders are generally packed within 24 hours on weekdays.
There is a 14-day return policy. Read more
Parts Denmark Info
Parts Denmark Info
Parts Denmark is a new webshop based in Denmark. We have a physical location you can visit (No showroom yet), and we have both email and phone support in our opening hours.
Our company info is:
Parts Denmark ApS
VAT: DK45974758
Dam Holme 11
3660 Stenløse, Denmark
hello@partsdenmark.com
+45 222 333 29
Best regards,
William Svendsen & Martin Høyer (Owners)
Specifications
FMF
041602
Muffler
Carbon Fiber
Stainless Steel
Slip-On
Each


Who is behind Parts Denmark
Martin and William are the duo behind Parts Denmark — an unlikely but awesome combo of a tech-savvy young IT wizard and a seasoned motorcycle guru who’s seen (and fixed) it all. Together, we’ve built a team with big ambitions, plenty of passion, and a shared mission to create great things — side-by-side with you.

