In stock

FMF Factory 4.1 RCT Exhaust System — Aluminum — Stainless Steel Header — Carbon Fiber End Cap

FMF · #1820-2047 · FMF / Full-Systems

Incorporates FMF Resonance Chamber Technology™ both internally and externally
Shorter overall length that is less susceptible to crash damage and complementary to Factory Forward Engineering, moving the muffler closer to the motor to centralize mass
Constructed from only aerospace grade materials that meet exacting specifications and is manufactured 100% at the southern California factory
Spark arrestor screen insert included
94dB insert included

$1074.99

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 & features6 features

Incorporates FMF Resonance Chamber Technology™ both internally and externally
Shorter overall length that is less susceptible to crash damage and complementary to Factory Forward Engineering, moving the muffler closer to the motor to centralize mass
Constructed from only aerospace grade materials that meet exacting specifications and is manufactured 100% at the southern California factory
Spark arrestor screen insert included
94dB insert included
For closed course competition only.

Specifications12 specs

Type: Race
Muffler Material: Aluminum
Units: Each
End Cap Material: Carbon Fiber
Muffler Color/Finish: Gray, Anodized
Model: Factory 4.1 RCT
Riding Style: Off-Road
End Cap Color/Finish: Black
Pipe Material: Stainless Steel
Shipping weight: 9.5 lb
Package size: 42.5 × 8.5 × 8.3 in
Country of origin: USA

Fitment3 models · Yamaha

Yamaha3 models

WR450F2024–2026
YZ450F2023–2025
YZ450FX2024–2026

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 #: 1820-2047
FMF part #: 044477

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 #044477.