This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.
Dynojet Thunder Slide Jet Kit For Harley
Designed for waking up the carburetor on Harley engines with an aftermarket air filter or exhaust system. The revolutionary composite plastic slide provides unparalleled performance gains in both horsepower and mileage. The unique set of lift holes moderate how the slide moves with respect to throttle position; the faster the slide opens, the quicker the throttle response.
Features:

Kit comes with jets, needles, clips and other necessary parts for CV carbs

Instructions included

Made in the USA
Note: This product is intended to be used only on racing vehicles on closed courses, and not for use on roads or vehicles otherwise subject to emission control requirements.