These screws basically hold everything together. Specifically, they’re designed to clamp the cylinder head down onto the engine block. It’s a high – pressure job. They need to withstand a lot of heat and force from the combustion process inside the engine. The Torx design – that star – shaped head – is really important because it allows you to get a lot of torque on the screw without stripping the head. That’s key with something this critical. Think of the cylinder head as the lid on the engine. These screws are what seals that lid on tight. They work with the head gasket to prevent combustion gases, oil, and coolant from leaking out, and to keep everything contained where it needs to be. They're a crucial part of maintaining compression, which is what gives your engine its power. If these screws fail, or aren't tightened to the correct specification, you can have major problems. You’ll notice if one goes bad because you’ll probably get a loss of power, overheating, or even a coolant leak. A failing head bolt can lead to a blown head gasket, which is a pretty expensive repair. It's really important to use the correct bolts and torque them properly when you’re doing any work up there. You can find these online pretty easily, I often recommend checking Fixparts Online, they have a good selection. And don't skimp – these aren’t parts you want to cheap out on. It’s a small price to pay for keeping your engine running smoothly. Long-lasting performance: Torx Screw (MPN 11122243143) is backed by a 12-month warranty!

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