Lock in your NSX bottom end—before boost, RPM, and heat try to pull it apart.

The ARP 90-05 Acura NSX Main Stud Kit is built for engine builders who refuse to gamble with the foundation of a 3.0L or 3.2L Acura NSX. When cylinder pressure climbs and temperatures swing, factory fasteners can stretch, clamp load can vary, and main caps can start to move—putting bearings, crank alignment, and the entire short block at risk.

ARP main studs deliver the consistent, high-strength clamping force you want in a serious rebuild—helping keep the main bearing caps securely seated for improved stability under hard acceleration, high RPM, and track-level abuse. The result: better bottom-end integrity, more reliable performance, and confidence to push your build.

Why builders choose ARP for the NSX:

• Stronger, more consistent clamping than typical OEM-style fasteners—helps reduce cap walk and maintain bearing alignment
• High-strength alloy steel construction engineered for durability and thermal stability in demanding conditions
• Precision-machined fit for the Acura NSX 3.0L / 3.2L engines—built for clean, confident assembly
• Ideal for performance rebuilds or restorations—from stock refreshes to high-horsepower builds
• Complete kit included—everything you need for a straightforward install

If you’re investing in machine work, bearings, and a quality rotating assembly, don’t let the main hardware be the weak link. Add the ARP Acura NSX main stud kit to your build and secure the foundation your engine depends on.

Features:

• Engine Compatibility: Acura NSX 3.0L & 3.2L
• Material: High-strength alloy steel
• Design: Precision-machined for optimal fit and consistent clamp load
• Application: Performance engine builds, rebuilds, and restoration projects
• Includes: Complete set of main studs for installation