In stock

FMF Factory 4.1 RCT Slip-On Muffler — Blue Anodized Titanium with Carbon Fiber End Cap — 350/390/430/480

FMF · #1821-2007 · 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
Meets AMA and FIM sound requirements

$749.99

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

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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
Meets AMA and FIM sound requirements
QuietCore 94 dB insert included
Spark arrestor included in muffler
Made in the USA
Compatible with stock header or FMF header.

Specifications11 specs

End Cap Material: Carbon Fiber
End Cap Color/Finish: Black
Model: Factory 4.1 RCT
Muffler Color/Finish: Anodized, Blue
Muffler Material: Titanium
Riding Style: Off-Road
Type: Slip-On
Units: Each
Shipping weight: 7.5 lb
Package size: 23.5 × 10.3 × 8.3 in
Country of origin: USA

Fitment23 models · Beta

Beta23 models

350 RR2020, 2023–2024
350 RR 4T2021, 2025
350 RR S 4T2024
350 RR X-Pro2025–2026
350 RR-Race Edition2020–2026
350 RR-S2020–2023
390 RR2020, 2023–2024
390 RR 4T2021, 2025
390 RR Race Edition 4T2026
390 RR S 4T2024
390 RR X-Pro2025–2026
390 RR-Race Edition2020–2026
390 RR-S2020–2023
430 RR2020, 2023–2024
430 RR 4T2021, 2025
430 RR S 4T2024
430 RR X-Pro2025–2026
430 RR-Race Edition2020–2026
430 RR-S2020–2023
480 RR2020, 2023–2024
480 RR 4T2021, 2025
480 RR X-Pro2025–2026
480 RR-Race Edition2020–2026

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 #: 1821-2007
FMF part #: 045668

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 #045668.