HOT WHEELS SLOT CAR TRACK SET 15.4 FEET SCALE SPEED 450 MPH 2 TURBO BOOSTERS KIDZTECH. Hot Wheels Slot Car Track Set 15.4 Feet Scale Speed 450 MPH 2 Turbo Boosters by Kidztech (2018). Item is Brand New, Unused, in Factory Sealed Box. Box has a small tear in front but is in otherwise Very Good Condition. Package is Factory Sealed. Hot Wheels Slot Car Track Set by Kidztech (2018). Includes 15.4 Feet of Track and Includes 2 High-Speed 1:43 Scale Racing Cars (Red and Green). Features a Scale Speed of 450 MPH. Includes 2 Turbo Boosters and Track Pieces including Loops. Recommended for Ages 5 and Up. Brand New in Factory Sealed Box.