Just wondered if you guys have any more "left-field" ways of impoving power?

I am looking at installing a large snorkel to improve power, as it should
1. Provide a "ram-air" effect at speed, minimal, but something.
2. More importantly it wont be sucking air from the hot engine bay.

I am looking for some different suggestions here guys, not the usual, chip exhaust and propane type stuff, so your intriguing ideas about pumping liquid nitrogen through a water to air cooler instead of an intercooler are quite welcome here...