They are cheap and you actually will pick up hp with them. If your engine is out do one. If you were to run your engine with 4 liters of oil instead of 5 you would basically be accomplishing the same thing the windage tray is going to do for you. I have seen tests done in mustang mags simulating what the windage tray does by putting less oil in the engine and they always make more rwhp. I don't understand why anyone would recomend not getting one if you have the engine out. It is a good piece to put on any car.