2Bros Parts

Q4 Hex Exhaust Silencer 19-23 Kawasaki KX 450 F X - FMF 042368

£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

The FMF Q4 HEX S/A 042368 is engineered for optimal off-road performance with exceptionally low sound output. It features advanced chamber design, baffles, and exclusive multi-stage packing materials to boost power across the rev range. This slip-on exhaust meets USFS and FIM World Enduro noise regulations. Its construction uses robust, lightweight aluminium and stainless steel, purpose-built for endurance riding. An integrated spark arrestor is included for compliance and safety. This exhaust offers power gains throughout the entire RPM range and is pounds lighter than the OEM exhaust. A quiet insert is included for further noise reduction. Closed course use only. Specifications include Item ID: 042368, Type: Slip-On, Configuration: Single, Construction: Aluminium, Finish: Natural, Midpipe: Stainless Steel, Endcap: Stainless Steel, Spark Arrestor: Screen Insert (included), Carb Warning: No, Quiet Insert: Included, Weight: 5.5 lbs. Manufacturer: FMF Exhausts.

Specifications
SKU
06-9891.Q4H
Brand
FMF Exhausts
Availability
In Stock (2)

Fitments (10)

MakeModelYear
KAWASAKIKX 450F2019
KAWASAKIKX 450F2020
KAWASAKIKX 450F2021
KAWASAKIKX 450F2022
KAWASAKIKX 450F2023
KAWASAKIKX 450X2019
KAWASAKIKX 450X2020
KAWASAKIKX 450X2021
KAWASAKIKX 450X2022
KAWASAKIKX 450X2023
General Product Group
Exhaust Systems & Parts
General Product Type
Silencer
Variant Id
286342
Delivery2–4 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

FMF Q4 Hex Exhaust Silencer

The FMF Q4 HEX S/A is engineered to deliver optimal off-road performance while maintaining exceptionally low sound output. Utilising advanced chamber design, baffles, and exclusive multi-stage packing materials, this slip-on exhaust boosts power across the rev range and meets stringent USFS and FIM World Enduro noise regulations. Its robust, lightweight aluminium and stainless steel construction is purpose-built for the demands of endurance riding, including an integrated spark arrestor for compliance and safety.

Key Features

  • Power gains are delivered throughout the entire RPM range
  • Meets USFS and FIM World Enduro sound regulations for quiet operation
  • Integrated spark arrestor offers maximum safety for off-road use
  • Lightweight, robust aluminium and stainless steel construction
  • Designed in the USA for superior off-road durability
  • Pounds lighter than the OEM exhaust for better handling
  • Quiet insert is included for further noise reduction
  • Closed course use only

Specifications

  • Type: Slip-On
  • Configuration: Single
  • Construction Material: Aluminium
  • Finish: Natural
  • Midpipe Material: Stainless Steel
  • Endcap Material: Stainless Steel
  • Spark Arrestor: Screen Insert (included)
  • Quiet Insert: Included
  • Weight: 5.5 lbs
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