98-99 HARLEY FLHTC: Dynojet Stage 1 Thunderslide Jet Kit Revolutionary composite plastic slide provides unparalleled performance gains in both horsepower and mileage. Designed for engines with stock or aftermarket air filter and exhaust system. 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. Kit also includes jets, needles, clips and other necessary parts for CV carbs. Made in the U.S.A.