I dont see this for stated price .It shows $470 . Maybe the canvas cover is $100 .

Most fuel injectors are "deposit resistant " in cars for the last twenty years.It doesnt mean they cant get restricted by contamination or deposits on the injector caused by incomplete combustion.It can never hurt your vehicle to use an injector cleaner periodically.Not only does it clean fuel lines,injectors ,but it cleans up the carbon buildup on the intake valves.I am a retired senior master tech in gas and diesel vehicles with over thirty years experience at dealership,so I know what I’m talking about. This is a good price also.