ARP 201-5000 Main Stud Kit for BMW M50/M52/S50US/S52US Inline-6 2-Bolt

Vehicle Fitment

• 1990-1995 BMW 325i (E30) (M50 2.5L I6, 2-bolt main)
• 1996-1999 BMW 328i (E36) (M52 2.8L I6, 2-bolt main)
• 1995-1999 BMW M3 (E36) (S50US 3.0L I6, 2-bolt main)
• 2001-2002 BMW M3 (E46) (S52US 3.2L I6, 2-bolt main)

Features

• Eliminates main cap walk and fretting
• Protects threads in the engine block
• Manufactured from 8740 chromoly steel
• Heat-treated to 190,000 psi tensile strength
• Precision J-formed threads rolled after heat treatment
• Includes hardened parallel-ground washers
• Comes with high-quality standard hex nuts
• Black oxide finish for corrosion resistance

Specifications

• Socket Size: 12mm 12-point, 4mm Allen
• Thread Size: M10x1.5
• Torque Specifications: Tighten in 3 steps (20 ft/lbs, 40 ft/lbs, 60 ft/lbs)
• Finish: Black oxide

Included Components

• 1x Main Stud Kit
• 12x 12-point nuts
• 12x Hardened parallel-ground washers
• 1x ARP logo sticker

Product Description

The ARP 201-5000 Main Stud Kit is engineered for BMW's M50, M52, S50US, and S52US inline-6 engines, specifically those with a 2-bolt main configuration. This kit is crucial for preventing main cap walk and fretting, which can lead to engine instability and premature wear. By securing the main caps more effectively than standard bolts, these studs ensure a more rigid and reliable bottom end.

Constructed from 8740 chromoly steel and heat-treated to a tensile strength of 190,000 psi, the studs feature precision J-formed threads rolled after heat treatment, offering superior strength and durability. The kit includes hardened parallel-ground washers and high-quality standard hex nuts, all finished with a black oxide coating to resist corrosion.

Ideal for both street and track applications, the ARP 201-5000 Main Stud Kit provides the necessary clamping force to maintain engine integrity under high-stress conditions, making it a valuable upgrade for performance enthusiasts.