ARP Shop Tools

ARP Shop Tools: The Missing Piece of Every Serious Engine Build

When engine builders invest in ARP (Automotive Racing Products) fasteners, they're already committing to hardware engineered to aerospace-level standards. But the tools and assembly aids that go alongside those fasteners matter just as much as the hardware itself. That's where ARP's Shop Tools category comes in — a focused lineup of products built to ensure that every ARP fastener performs exactly as intended during installation.

The Science Behind ARP Ultra-Torque Assembly Lubricant

The centerpiece of ARP's shop tools offering is the ARP Ultra-Torque Fastener Assembly Lubricant — and it's far more than a convenience product. Because of frictional inconsistencies with oil, moly, and other lubricants, it typically takes multiple torque cycles to achieve the required fastener preload. With ARP Ultra-Torque, a fastener need only be torqued once to get within 5 percent of ideal preload, and it remains consistent through all subsequent cycles.

ARP's Ultra-Torque is specifically designed to reduce tension pre-load scatter and eliminate the need to cycle high performance engine fasteners before installation. This is a critical distinction for builders working with premium hardware: inconsistent preload across adjacent fasteners can cause bore distortion, compromise piston ring seal, and lead to head gasket failure — expensive consequences that a single tube of assembly lube can prevent.

ARP's Ultra-Torque is a premium-grade moly-based lubricant with rust and corrosion inhibitors, effective over a lubrication range of -30 to 550°F and a load range of 500,000 psi. Those specs make it suitable for everything from street rebuilds to full competition engine assembly.

Why ARP Specifies Its Own Assembly Lube

ARP provides torque specs for their fasteners based specifically on using ARP Ultra-Torque. Without it, there's no reliable way to know what preload is actually being achieved — ARP has done the testing to measure torque applied against resulting preloads, comparing their lube against others with documented results to back it up. In other words, when you follow ARP's torque specifications, those numbers are only accurate when paired with Ultra-Torque.

Ultra-Torque obtains 95–100% of all recommended installation preloads on the first pull, without cycling fasteners before final installation, and maintains preloads within 5% on all remaining cycles — ensuring consistent and repeatable housing bores and cylinder bore dimensions during machining, mock-up, and assembly.

Trusted From the Shop Floor to the Race Track

Back in 1968, racing enthusiast Gary Holzapfel saw that broken engines were being caused by fastener failure, and — finding no commercially available hardware up to the challenge — drew on his aerospace fastener experience to found ARP. That same precision-first philosophy extends to every product in ARP's lineup, including their shop tools. ARP achieved ISO 9001 and AS9100 certification in 2009, and has maintained these certifications as a reflection of their unwavering dedication to the highest-quality products available.

Whether you're assembling a street engine or a race-prepped powerplant, ARP's shop tools give you the confidence that your fasteners are doing exactly what they were designed to do. Browse the full ARP brand page to explore their complete fastener catalog, or shop all Shop Tools to find the assembly aids your next build demands.