2Bros Parts

Q4 Exhaust Silencer 03-06 Yamaha WR YZ 450 F - FMF 044199

£423.77

4.1 Trustpilot 99.9% positive on eBay

Free UK delivery 2–4 business days

Spread the cost with Klarna 18+, T&Cs apply

1

FMF Q4 exhaust silencer featuring high-performance quiet technology for competitive off-road use. Engineered for maximum power without excessive noise, it offers industry-leading sound reduction using precision chambers and multi-stage packing. The silencer boasts an aircraft-grade aluminium body with a stainless steel midpipe and endcap for durability and weight savings. It is lightweight at 5.9 lbs, compatible with FMF or stock OEM headers, and includes a removable screen-type spark arrestor. Maximum sound output is 96dB, with most applications operating below 93dB. This is a slip-on, single configuration silencer. Variant code is 044199. Intended for closed course use only.

Specifications
SKU
06-1728.FMF.Q4
Brand
FMF Exhausts
Availability
In Stock (2)

Fitments (17)

MakeModelYear
YAMAHAWR 450F2003
YAMAHAWR 450F2004
YAMAHAWR 450F2005
YAMAHAWR 450F2006
YAMAHAWRF 4502003
YAMAHAWRF 4502004
YAMAHAWRF 4502005
YAMAHAWRF 4502006
YAMAHAYFZ 4502003
YAMAHAYFZ 4502004
YAMAHAYFZ 4502005
YAMAHAYZ 450F2003
YAMAHAYZ 450F2004
YAMAHAYZ 450F2005
YAMAHAYZF 4502003
YAMAHAYZF 4502004
YAMAHAYZF 4502005
General Product Group
Exhaust Systems & Parts
General Product Type
Silencer
Variant Id
209193
Delivery2–4 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

FMF Q4 Exhaust Silencer

Engineered for off-road enthusiasts demanding maximum power without excessive noise, the FMF Q4 exhaust silencer delivers industry-leading sound reduction. Its versatile construction allows compatibility with both OEM and FMF headers, making it a versatile, durable upgrade that excels in performance without breaching noise limitations. Includes a removable spark arrestor for safe, controlled riding.

Key Features

  • High-performance quiet technology developed for competitive off-road use.
  • Maximum sound output is 96dB, with most applications outputting below 93dB.
  • Aircraft-grade aluminum body with stainless steel midpipe and endcap for strength and weight savings.
  • Lightweight at 5.9 lbs for improved handling.
  • Compatible with FMF or stock OEM headers for flexible installation.
  • Removable screen-type spark arrestor included for regulation compliance.

Specifications

  • Type: Slip-On
  • Configuration: Single
  • Construction: Aluminum
  • Finish: Natural
  • Midpipe: Stainless Steel
  • Endcap: Stainless Steel
  • Spark Arrestor: Screen Insert (included)
  • Weight: 5.9 lbs
  • Maximum Sound Output: 96dB (most models below 93dB)
  • Intended Use: Closed Course Only
Before you buy

QUESTIONS? JUST ASK

Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.

Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.

UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. Delivery details

Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy

By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.

More answers in our FAQ.

Trade pricing available

Buying parts for your business? Apply for a 2BrosParts trade account.

Apply for Trade
1