Ordered this product for my 05 f-350 not only is it preventative maintenance it gave my truck better throttle response. Very pleased with this product I highly recommend!
I installed this along with a couple of new injectors and my cold starts and throttle response improved. I can't say how much the spring contributed, but the truck feels better than it did before the injectors failed.
Ordered for my 05 6.0 and was very pleased, it’s an important and very easy fix for another one of fords goofy mistakes! Also made my trucks cold starts easier.