Q4 Hex Exhaust Silencer 20-21 Kawasaki KLX 300 R - FMF 042388
4.1 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 
18+, T&Cs apply
Engineered for off-road riders demanding outstanding performance with minimal noise, the FMF Q4 HEX S/A delivers power gains across the entire rpm spectrum while meeting strict sound regulations. Its advanced chamber and baffle design, combined with proprietary multi-stage packing, ensures a quieter ride without sacrificing performance. The robust construction keeps weight to a minimum and includes a spark arrestor for added safety and compliance. This slip-on silencer is constructed from lightweight aluminum with a natural finish. The midpipe and endcap are manufactured from stainless steel for durability. It includes a screen insert spark arrestor and a 94dB quiet insert for reduced sound. Power increases throughout the rpm range. Meets USFS and FIM World Enduro sound standards. Built rugged for off-road endurance and pounds lighter than OEM exhaust systems. Made in the USA. Item ID 042388. Weight 6.6 lbs (approx. 3 kg). Carb Warning yes.
- SKU
- 06-9937.FMF.Q4H
- Brand
- FMF Exhausts
- Availability
- In Stock (2)
Fitments (2)
| Make | Model | Year |
|---|---|---|
| KAWASAKI | KLX 300R | 2020 |
| KAWASAKI | KLX 300R | 2021 |
- General Product Group
- Exhaust Systems & Parts
- General Product Type
- Silencer
- Variant Id
- 296908
FULL DESCRIPTION
FMF Q4 Hex Exhaust Silencer - Unleash Performance, Conquer Noise
Engineered for off-road riders demanding outstanding performance with minimal noise, the FMF Q4 HEX S/A delivers power gains across the entire rpm spectrum while meeting strict sound regulations. Its advanced chamber and baffle design, combined with proprietary multi-stage packing, ensures a quieter ride without sacrificing performance. The robust construction keeps weight to a minimum and includes a spark arrestor for added safety and compliance.
Key Features:
- Type: Slip-On
- Configuration: Single
- Constructed from lightweight aluminium with a natural finish
- Midpipe and endcap manufactured from stainless steel for durability
- Includes a screen-type spark arrestor insert for safety and compliance
- Delivers power increases throughout the rpm range
- Meets USFS and FIM World Enduro sound standards
- Built rugged for demanding off-road endurance
- Proudly made in the USA
- Includes a 94dB quiet insert for significantly reduced sound output
- Noticeably lighter than OEM exhaust systems, reducing overall vehicle weight
Specifications:
- Exhaust Type: Slip-on silencer
- Spark Arrestor: Included
- Quiet Insert: 94dB (included)
- Material: Aluminium body, stainless steel midpipe and endcap
- Finish: Natural
- Weight: Approximately 6.6 lbs (3 kg)
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.