ARP Main Stud Kit – B16A VTEC

ARP Main Stud Kit – B16A VTEC

Strengthen the bottom end of your Honda B-series engine with the ARP Main Stud Kit for B16A VTEC. Designed for performance and reliability, this kit replaces the factory main bolts with high-strength studs that improve clamping force and alignment between the main caps and engine block — a critical upgrade for high-rpm or boosted builds.

Each stud is made from premium 8740 chrome-moly steel and heat-treated to a tensile strength of approximately 190,000 psi. The threads are rolled after heat treatment for maximum fatigue resistance, while the kit’s hardened washers and 12-point nuts ensure even torque and consistent bearing crush during assembly.

Specifications

• Engine application: Honda B16A VTEC (including 1989–1991 CRX SiR, 1992–1993 Integra XSi/RSX, 1999–2000 Civic Si, and other B16A-based variants)

• Material: 8740 chrome-moly steel

• Tensile strength: ~190,000 psi

• Includes: Main studs, 12-point nuts, and hardened washers

Why It’s Essential

• Reinforces the main bearing caps against movement and cap walk

• Improves block rigidity and oil clearances at high rpm

• Provides precise torque loading and reusability compared to OEM bolts

• Recommended for turbocharged, supercharged, or high-compression naturally aspirated engines

Applications
Perfect for B16A and B16A2 VTEC engine builds where durability and accuracy matter — from street performance to full race preparation.