Low wattage LEDs produce little to know heat. However, high power/ multiple LED panels produced a decent amount of heat. Oddly enough also when you run an LED for an extended amount of time it produces a noticeable amount of heat. That's what kills standard LEDs in the license plate sockets. With the right amount of heat for an extended period of time LEDs burn out... Thus the heat sink. Also LEDs produce heat on the backside of the light rather than the front like standard lights.
Roush performance intake, Exedy 12.5 lb flywheel, Massive 76A lower engine mount... more to come with more money.