In stock

FMF Factory 4.1 RCT Slip-On Muffler — Blue Anodized Titanium with Carbon Fiber End Cap — EX/MC

FMF · #1821-1921 · Slip-Ons / Exhaust

RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power output
Internal ducts in the chambers of the RCT system increase internal volume for improved exhaust flow, resulting in power gains throughout the entire range of power
FMF's Factory Forward Engineering centralizes mass and is less prone to crash damage
Innovative rear end cap features simple installation of tuning tip inserts or spark arrestor with the removal of four screws
Compatible with stock header or FMF header

$854.99

In stock. Ships in 2–4 business days · free shipping over $150.

Questions? Call the shop: 801-361-3010

Real shop · real humans · 1231 N 1300 W Ste A, Centerville, UT 84014

Shop all FMF
Everything we carry from FMF →

Description & features9 features

RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power output
Internal ducts in the chambers of the RCT system increase internal volume for improved exhaust flow, resulting in power gains throughout the entire range of power
FMF's Factory Forward Engineering centralizes mass and is less prone to crash damage
Innovative rear end cap features simple installation of tuning tip inserts or spark arrestor with the removal of four screws
Compatible with stock header or FMF header
Meets AMA and FIM sound requirements
QuietCore 94 dB insert included
Spark arrestor included in muffler
Made in the USA

Specifications11 specs

End Cap Color/Finish: Black
Riding Style: Adventure Touring / Dual-Sport, Off-Road
Model: Factory 4.1 RCT
Muffler Color/Finish: Anodized, Blue
Muffler Material: Titanium
End Cap Material: Carbon Fiber
Type: Slip-On
Units: Each
Shipping weight: 7.1 lb
Package size: 40.8 × 6.5 × 6.3 in
Country of origin: USA

Fitment13 models · Gas Gas, Husqvarna, KTM

Gas Gas4 models

EX 350F2021–2023
EX 450F2021–2023
MC 350F2022–2023
MC 450F2021–2023

Husqvarna4 models

FC3502019–2022
FC4502019–2022
FX3502019–2022
FX4502019–2022

KTM5 models

350 SX-F2018–2022
350 XC-F2018–2022
450 SX-F2018–2022
450 SX-F Factory Edition2018–2020
450 XC-F2018–2022

Fitment comes from the catalog data for this part. Double-check your year, model and trim before you order — or call the counter at 801-361-3010 and we’ll check it with you.

Part numbers

Salto part #: 1821-1921
FMF part #: 045629

Shipping

In stock. Ships in 2–4 business days by ground.

Ground shipping is $14.95, free on orders over $150. Stock is checked again before your card is charged.

Questions4 answers

Is it in stock?: Yes — it’s in stock right now. We check again the moment you order, before anything is charged.
How fast will it get to me?: Usually 2–4 business days by ground.
Will it fit my machine?: It’s listed for the models in the Fitment section above. Not sure about your trim or year? Call the counter at 801-361-3010 and we’ll check it with you.
Is this genuine FMF?: Yes. It’s new and genuine, straight from Salto — FMF part #045629.