2Bros Parts

END OF LINE Q4 Hex Exhaust Silencer 10-17 Beta 350 400 450 498 520 RR RS - FMF 045522

$352.74

4.1 Trustpilot 99.9% positive on eBay

Delivery to United States 5–8 business days

Spread the cost with Klarna

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FMF Q4 Hex Exhaust Silencer 045522. For Closed Course Competition Use Only. Less sound equals more ground. Meets USFS and FIM World Enduro sound regulations. Power gains throughout the entire RPM range. Spark arrestor included. Lighter than stock. Unmatched reliability and performance from high-tech materials. Manufactured to exacting standards. Meets or exceeds OEM quality. Direct OEM replacement. Easy to install. Weight: 3950 grams.

Specifications
SKU
06-1966.FMF.Q4
Brand
FMF Exhausts
Availability
In Stock (4)

Fitments (63)

MakeModelYear
BETARR 3502010
BETARR 3502011
BETARR 3502012
BETARR 3502013
BETARR 3502014
BETARR 3502015
BETARR 3502016
BETARR 3502017
BETARR 3502018
BETARR 3902017
BETARR 3902018
BETARR 4002010
BETARR 4002011
BETARR 4002012
BETARR 4002013
BETARR 4002014
BETARR 4302017
BETARR 4302018
BETARR 4502010
BETARR 4502011
BETARR 4502012
BETARR 4502013
BETARR 4502014
BETARR 4802017
BETARR 4802018
BETARR 4982010
BETARR 4982011
BETARR 4982012
BETARR 4982013
BETARR 4982014
BETARR 5202010
BETARR 5202011
BETARR 5202012
BETARR 5202013
BETARR 5202014
BETARS 3502010
BETARS 3502011
BETARS 3502012
BETARS 3502013
BETARS 3502014
BETARS 3502015
BETARS 3502016
BETARS 3502017
BETARS 4002010
BETARS 4002011
BETARS 4002012
BETARS 4002013
BETARS 4002014
BETARS 4502010
BETARS 4502011
BETARS 4502012
BETARS 4502013
BETARS 4502014
BETARS 4982010
BETARS 4982011
BETARS 4982012
BETARS 4982013
BETARS 4982014
BETARS 5202010
BETARS 5202011
BETARS 5202012
BETARS 5202013
BETARS 5202014
General Product Group
Exhaust Systems & Parts
General Product Type
Silencer
Variant Id
209537
Delivery5–8 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

FMF Q4 HEX Exhaust Silencer

The FMF Q4 HEX is a high-performance exhaust silencer engineered for competition use. This silencer represents a significant upgrade, offering a compliant design focused on maximizing performance without the need for restrictive inserts often found in standard moto mufflers.

Key Features:

  • Engineered for reduced sound output while enhancing performance.
  • Meets US Forest Service (USFS) and FIM World Enduro sound regulations.
  • Provides power gains across the entire RPM range.
  • Includes an integrated spark arrestor.
  • Significantly lighter than stock exhaust systems.

Additional Information:

  • Constructed from high-tech materials for unmatched reliability and performance.
  • Manufactured to exacting standards, ensuring confidence during engine rebuilds.
  • Meets or exceeds Original Equipment Manufacturer (OEM) quality standards.
  • Designed as a direct OEM replacement for straightforward installation.
  • Offers excellent value for money.
  • Installation is straightforward, but professional assistance is recommended if unsure.
Before you buy

QUESTIONS? JUST ASK

Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).

Call us+44 330 133 3748
Email us[email protected]

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.

Yes. We ship from the UK. Orders ship within 3 working days, then delivery to the United States takes 5–8 business days. The delivery price is shown at checkout before you pay. 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.

Any customs duties or import taxes charged in the United States are paid by you when the parcel arrives. Any tax we collect ourselves is shown at checkout before you pay.

More answers in our FAQ.

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