It depends on what you're trying to accomplish. If you are looking to take hit away from the car, I would look at 4.10 or 4.30. If you are looking for ET, the 4.56 should be fine. My concern is the 1.76 depending on weight and how hard it's hitting. Nothing wrong with the 1.76 but it will eventually fail. I would look more at 1.80 straight cut.