Later version of the nitrous, with fogger nozzles pointing directly at the intake valves. Completely hidden underneath the intake. This was back before the Mr. Gasket Borg began buying up all the neat little companies. This was back in the day when every decent sized town had at least one speed shop. San Diego had about twenty of them. Before the days of "Tuners" buying their bolt-on go-fast off of the internet. But I digress.