The FMF Powercore 4 HEX Slip-On brings race-inspired performance to your Kawasaki KX 450, X, or SR (2019–2023) without the premium price tag. Designed for riders who want real power gains and proven durability, it features Hi-Flo core technology and FMF’s space-age internal packing for max performance and longevity.
Key Features
Affordable Performance: Delivers increased horsepower and torque without breaking the bank.
Durable Construction: Built from stainless steel and aluminum for years of abuse.
Enhanced Sonic Evacuation: Tuned for higher flow and cleaner power delivery.
Header Compatibility: Works with FMF or stock OEM header systems.
Made in the USA: 100% manufactured in FMF’s Southern California facility.
Specifications
Fitment: Kawasaki KX 450 / X / SR (2019–2023)
Item ID: 042367
Type: Slip-On
Construction: Aluminum canister with stainless steel midpipe and endcap
Finish: Natural
Spark Arrestor: Screen insert included
Quiet Insert: Sold separately
Weight: 5.2 lbs.
Use: Closed Course Only
Step up your KX’s performance with the Powercore 4 HEX—FMF’s go-to for riders who want more power and less price.
Shipping Information
We strive to get your order to you as quickly as possible! Here’s what you need to know about our shipping policies:
Fast Shipping: Most items ship within the same day or within 48 hours of your order being placed.
Custom Orders: Please allow additional processing time for custom or made-to-order products.
Flat Rate Shipping: Enjoy $9 Flat Rate Shipping on all standard orders.
Free Shipping:
Orders over $90 qualify for FREE shipping!
Always FREE shipping on:
ASV Levers
Rough Country Products
S3 Power Sports Products
No Sales Tax Outside Minnesota: Since we only have a tax nexus in Minnesota, sales tax is only collected on orders shipped within MN.
Customers with shipping addresses outside Minnesota automatically save on sales tax—just one more way to get great value!
(Please consult your local tax policies for compliance in your area.)
We’re committed to delivering your products efficiently and reliably. Thank you for choosing us!
Let customers speak for us
from 12 reviews
Great service
Was looking for the limited addition new glory harnesses and sent a message to make sure they had them in stock. Got a quick response and went ahead and ordered he shipped them out next day. Super happy with the service.
Excellent service and reached out to make sure I got what I needed. Got the lever in under a week here in Kentucky. Actually ordered another for another bike because of service.
I was really hoping for this lever to help my 4 year old on his stacyc and it made a huge difference. Closer to the bars, easier for him to squeeze as he is 4 and all around great lever. Super happy with the purchase.
