Everything You Need to Know about ARP Hardware

Save this for later, we're breaking down everything you need to know about ARP hardware, from washer orientation to materials:

Washer Alignment

On ARP stud kits that include washers, you may notice one side of the washer is textured while the other is smooth.

The textured side should face ‘down,’ towards the surface you are torquing, like a cylinder head or main cap. The smooth side should face ‘up,’ towards the nut.

Torque Specs

Did you know that ARP fasteners have different torque specs than OEM? Every fastener has a limit to which it can be stretched, AKA yield. The yield of a fastener is determined by its materials and design. Torquing beyond this spec will stretch the fastener beyond its original length, compromising its integrity.

ARP has a legacy for being the best for a reason: engineering, manufacturing, design, quality and research. You can trust their spec sheets because they have become the industry expert and authority.

Materials

Need we say more? ARP2000 should be your new standard when it comes to re-assembling any engine. With greater strength and integrity than OEM fasteners, this material was born to perform.

And when you’re ready to start pushing the absolute limits on your high performance build? Sleep easy knowing ARP’s Custom Age 625+ boasts a tensile strength of 280,000 psi.

Head Stud Re-Torque

Only required after your initial heat cycle, re-torque ensures that your engine is properly clamped by ensuring that the components which compress and conform during the initial heat cycle (head gaskets, for example) are still properly and evenly clamped, sealed, and aligned.