Nitrous Express 15004 Boosted Stand Alone Fuel Enrichment (SAFE) System Improves the performance of any nitrous system Includes a one gallon, high strength, composite fuel cell that can be mounted in most factory battery trays without modification Comes preassembled with a high output internally mounted fuel pump and an adjustable external regulator Fuel pressure can be adjusted from 3 to 60 pounds per square inch and no special jetting is required Regulator is boost referencing, making it compatible with supercharged and turbocharged applications