BBC Main Stud Kit 2-Bolt w/Windage Tray

The ARP Big Block Chevy Main Stud Kit 2-Bolt with Windage Tray (part number 235-5502) is a precision-engineered fastening solution designed for high-performance big block Chevy engine builds. This main stud kit replaces factory bolts with chromoly studs, significantly improving clamping force consistency and reducing the risk of main cap failure under extreme load conditions. The 2-bolt configuration addresses the original equipment specification, while the included windage tray manages oil splash and enhances internal engine efficiency during sustained high-RPM operation.

Chromoly construction delivers superior tensile strength compared to standard steel fasteners, critical for engines experiencing boost pressure, nitrous injection, or sustained dyno pulls. The black oxide finish provides corrosion resistance during assembly and storage, reducing oxidation risk in the engine bay environment. ARP's hex-nut design ensures straightforward installation without requiring specialized tooling, and the standardized thread pitch allows precise torque specification for optimal load distribution across all main bearing surfaces. The windage tray component reduces parasitic drag from oil circulation and supports cleaner combustion chamber environment by limiting crankcase pressure buildup.

This kit suits rebuilders, performance shops, and engine builders preparing big block Chevy platforms for racing, turbocharged applications, or high-output street builds. It addresses the specific weak point in original two-bolt main architecture—the main cap fastening interface—where stock bolts can yield under cylinder pressure spikes. Proper installation with correct torque sequencing and ARP's recommended assembly lubricant ensures repeatable performance across multiple heat cycles and engine starts.

ARP fastening systems are manufactured to strict tolerance standards and undergo quality verification before shipment. The big block Chevy platform remains a popular choice for hot rod, muscle car, and marine engine applications where main stud upgrades are essential insurance against catastrophic bearing failure. This kit represents a foundational upgrade that complements other block strengthening modifications like girdle bracing or deck height verification.