Twin Air has developed a PowerFlow kit that provides optimal air flow, more protection, and replaces the complete OEM filter system.
The KX250F/X kit includes a base plate, pre-oiled filter, and a stout, lightweight billet-aluminum cage that replaces your flimsy plastic stock cage.
The KX450F/X kit includes a Glass Fiber Composite Cage, Base plate and a Pre-Oiled Air Filter.
Need the KX450F/X installation manual? Click here for the official Twin Air video guide!
Do you have an installation manual for the KX450F/X?
Yes! Click here for the official Twin Air installation video!
What are the benefits to a Twin Air PowerFlow kit?
More power! When your engine can breathe more efficiently with a good filter, you will gain performance throughout the power range. The increase in filter surface over OEM allows that improved airflow and protection. Not only that, but Twin Air filters are durable and reuseable.
Why choose Twin Air filters over other brands?
We found Twin Air to be our preferred brand for air filters, due to their ease of use, dyno testing performance and availability.
Shipping
We offer free freight for online orders over $75.00 in the USA (Excluding AK & HI) Online orders only.
For International orders:
All orders will be shipped with an original invoice on the box, which shows the full amount that you paid for the products you have purchased. This will ensure that your package processes through customs with no delays. Some countries have import tax laws, in which case you would be liable to pay import tax on the items you buy from us. Please do your best to educate and familiarize yourself with these policies in your country. You may be responsible for paying these fees once you have received the package.
Returns
We want you to be happy with your XPR products and offer returns on orders 30 days after they are shipped. If for any reason, you're not happy with your purchase contact us.
Frequently Asked Questions
Let customers speak for us
So much more power! Stop thinking about it and just do it. Totally worth it!
This is the ultimate upgrade for your 250. For those on the fence about purchasing, You will not regret it
How can you not give this 5 ☆. Best aftermarket small part that can make that ride in the back country a pleasant one. Instead of walking the bike back to the truck because Yamaha engineering thought a piece of plastic MM from the exhaust won't get soft and rupture. Thank you XPR for that peace of mind.
Ordered the dual injector and Vortex ECU from XPR. Shipping was super quick. I even emailed asking a few questions when i got it and Leah responded immediately (on a Saturday night literally in the middle of A1). So exceptional service but the injector kit and mapping on the ECU are even better. I'm absolutely amazed at just how much this combo woke up my sons 2025 YZ250F. I can't recommend these guys enough.
I had flame out issues on the KTM 350XCF 2018 model i tried from the start adding a fly wheel weight then after that i added a rekluse clutch i even reflashed the ECU via a reputable local tuner with still no luck! or a result i was looking for so in the end i let the moths out of my wallet and got to the core of the issue and that was installing a xpr mapped Vortex and that nailed it on the head , the bike is insane and pulls like a 16 year with a playboy magazine ! Trust me dont be a tight ass and just buy it ! No flame outs at all !
Well made, easy install. Always need more titanium!
These guys and girl rock
Over all the years that I have been riding / racing I have tried many companies and products. As a vet rider / racer I can absolutely say that XPR Motorsports is by far the best place to deal with, their customer service is bar none, the quality of their products is fantastic. I recently purchased a 2nd injector kit with Vortex ECU for my 2025 Yamaha YZ250F and am thoroughly satisfied. Chad and Leah took the time to explain and answer all my questions, I love the fact that they care about their customers satisfaction. I will be a lifetime customer and absoluetly recommend them.
I have done a lot of research on ECUs and how they change the bike. This ECU has brought my bike to life in a way I did not know was possible. It almost feels like a 350 now!! The low-end map in the sand works phenomenally. It’s almost like being able to go up one tooth in the rear sprocket by a map! Then, the all-around best power map made my chassis feel much more compliant, and the power was consistent throughout the throttle range. This ECU helps your bike’s power, suspension, and chassis feel. Trust me. It's worth every penny!
Sent my Vortex to Chad to get some more top end power and over rev out of my CRF250. Absolutely knocked it out of the park in meeting my needs with this bike. A+ and highly recommend! Communication is the best in the industry as well!
Couldn’t be happier with the quality of product. Super easy installation!👍
Our new race bike got the 2nd injector kit and Vortex X10. It truly changed the bikes overall performance and power delivery. We also tested the Vortex on the single injector and it was night and day difference. For those looking to have single injector but more gain then the Vortex X10 is the way to go. Set aside from the kit, customer service was fantastic and had answers to all of our questions. We are very impressed with the results from both XPRs services and quality!!!