🔥Hot Wheels Launcher or Speed Booster? Lego Technic

Making and testing booster for Hot Wheels using Lego Technic parts, engines, and wheels :)

00:00 Model MK I
01:01 Let's test it
01:20 OK, now let's try MK II
02:04 Upgrade for MK I
02:35 Increasing RMP for high speed
03:02 Time for The Big One!