If you’ve installed the wrong bolts that hold on the thin metal plate between the engine and flywheel, you can have some issues. The wrong bolts can cause the engine to feel “locked up” or cause a strange scraping noise / knock. These bolts have a very shallow head to allow the proper clearance to the flywheel, use the wrong bolt and there will be contact between the head and the flywheel. You don't want that.
Fits all 22R / 22RE / 22RTE
depending on the year of the engine in your truck, you may only need 1