anti lag works something like this. It has mild to wild depending what u use it for and who sets it up, Its defo not a diy job unless U have the proper equiptment. It works by retarding the ignition timeing to fire on the exhaust stroke so the explosion spins up the turbo and keeps it going off throttle, foot down and timeing back to normal in a split second and full power it there if wild antilag is used it will eat a turbo or two u will need

turbo with internal mods
p8 ecu
Idle speed valve modified
pipe work for the above valve
eprom maped to run it all

give a few cosworth specialists a phone and ask them there advice