ARP

ARP stands for Automotive Racing Products and is an American manufacturer specialising in high-performance bolts, studs and fastening components for engine and drivetrain applications. ARP describes itself as the world leader in high-performance automotive fasteners, and since 1968 the company has focused on developing stronger and more precise fastening solutions for demanding applications.

The brand was founded by Gary Holzapfel after he saw repeated engine failures caused by inadequate fasteners in the racing world. According to ARP, the company was the first to specifically design and develop fasteners for racing, and today the range includes thousands of part numbers covering everything from engine blocks and cylinder heads to drivetrain and wheel mounting.

ARP is especially known for products such as head bolts and head stud kits, connecting rod bolts, main bearing bolts and studs, wheel bolts/studs, as well as special bolts, nuts and washers for performance and motorsport use. Their own catalogue and search system show that the range covers virtually all critical fastening points in the engine and drivetrain, which makes ARP relevant for engine rebuilds, tuning and serious race projects.

One of ARP’s major strengths is its focus on materials, production and quality control. ARP states that it carries out production in-house and works with its own materials and fastener technologies, while its special order programme also includes several material types with very high tensile strength. The company also highlights certifications such as ISO 9001 and AS9100 in its production.

At Qualitec, ARP is therefore an obvious brand for those looking for bolts and studs for performance engine builds, motorsport and demanding upgrades where standard fasteners are not always enough. Whether you are building a turbo or supercharged engine, upgrading the bottom end or want more secure fastening in a heavily loaded setup, ARP is a strong choice when quality and durability are decisive.