ages ago i used that that 2k boost, its a waste of time and is about £25, its said that it cleans carbs and get all deposites off the cylinders/pistons etc. and makes them like new.
funny cos when i took my cylinder head off my other car recently i had to really work the burnt on crap to get it off, somethink a bit of stuff in a can ill have no chance
id say stick with the stuff thats under £10