S/S Header Bolt Kit - 3/8 x .875 UHL (16)

The S/S Header Bolt Kit - 3/8 x .875 UHL (16) by ARP is designed for engine builders and mechanics who are upgrading exhaust manifolds or headers on high-performance vehicles. These stainless steel fasteners are intended to replace factory hardware that may fail under thermal cycling, vibration, and exhaust heat stress. Quality header bolts are essential to prevent manifold separation, exhaust leaks, and gasket failure, ensuring both performance and reliability.

ARP's stainless steel construction offers corrosion resistance, making them suitable for exhaust environments. The 3/8-inch diameter and 0.875-inch underhead length (UHL) specification provide the necessary clamping force for most standard header applications. Each kit includes 16 bolts with precision-rolled threads, which help maintain consistent preload and reduce galling during installation.

This 16-piece kit is compatible with most V8 and large-displacement engine header applications featuring a standard bolt pattern. Both professional mechanics and DIY enthusiasts upgrading from cast-iron manifolds to performance headers can rely on ARP fasteners for their durability and ease of disassembly, which is a significant advantage over traditional steel bolts.