As long as you have a way of blowing/cleaning the injectors out after the soak, you can put them in any of our Chem-Dip products.  Some people also soak them in Berryman B-12 Chemtool Fuel Injector Cleaner (part #0116) instead because of its aggressive nature toward fuel residues.  Again, just make sure you blow the injectors out to remove as much chemical and gum/varnish as possible.