When it comes to building an engine, every bolt matters. Whether you’re assembling a high-revving small-block, torquing down a big-block Ford, or blueprinting a record-breaking race engine, you can’t cut corners on fasteners. That’s why ARP—the industry leader in high-performance fasteners—has just released its 2025 Full-Line Catalog, an essential guide for serious builders.

This 180-page, full-color catalog is more than just a parts list—it’s a technical manual packed with over 5,500 fastener kits covering everything from cylinder heads and main studs to driveline and accessory bolts. But what makes ARP’s catalog truly stand out is its dedication to education.

Fasteners aren’t just nuts and bolts—they hold together thousands of dollars in performance parts. That’s why ARP devotes several dozen pages to explaining the science of fastener manufacturing, torque specs, and proper installation techniques. Whether you’re a seasoned engine builder or a first-time DIYer, understanding metallurgy, thread engagement, and clamping force can mean the difference between reliability and catastrophic failure.

But ARP didn’t stop at technical data. The 2025 catalog also includes a fold-out 22” x 11” poster of the legendary “Speed Demon” streamliner, the fastest piston-powered car on the planet. It’s a fitting tribute, considering ARP fasteners help keep that 2,500-horsepower beast together at over 470 mph.

Beyond fasteners, the catalog also details ARP’s line of specialty tools, designed to make engine assembly smoother and more precise. Whether you’re torquing down main studs, installing rocker arm hardware, or blueprinting an entire short block, ARP has the right tool for the job.