SKU: 201-5000 | UPC: 672036030070
ARP BMW M50 / M52 S50US/S52US 2-Bolt Main Stud Kit 1991-2000
ARP main stud kit strengthens bottom-end assembly in BMW M50, M52, S50US, and S52US engines found in E36 M3, Z3, 323/328 series, and 5-Series models from 1991 to 2000. Stud design maintains even clamp load under high stress for dependable engine operation. Built with ARP precision for racers and daily drivers seeking lasting fastener performance.
Key Features
- Genuine ARP Fasteners: High-tensile 8740 chromoly steel construction rated at 200,000 psi for secure main cap retention
- Stud Configuration: Replaces bolts to minimize cylinder block thread damage and ensure torque accuracy over multiple services
- Rolled Threads: Provide maximum thread strength, better pull-down force, and consistent torque values for repeated use
- Complete Hardware Set: Includes studs, washers, and nuts matched for direct replacement and hassle-free assembly
- Versatile Application: Handles demands of boosted street cars, drag strip runs, and endurance track days without failure
Product Notes
- Inspect main cap threads for damage prior to installation to avoid complications
- Apply ARP Ultra-Torque fastener lubricant on threads and under nut faces for precise clamping
- Fully assembled kit ships in protective ARP packaging to prevent shipping damage
Installation Notes
- Professional installation recommended.
- Torque to ARP specifications in proper main cap sequence starting from center outward
- All necessary washers and nuts supplied for 2-bolt main cap compatibility
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1995-1999 | BMW | M3 | Base |
| 1995 | BMW | M3 | Lightweight |
| 1999-2000 | BMW | Z3 | M Coupe |
| 1998-2000 | BMW | Z3 | M Roadster |
| 1997-2000 | BMW | Z3 | Roadster |
| 2000 | BMW | 323Ci | Base |
| 1998-2000 | BMW | 323i | Base |
| 1998-1999 | BMW | 323is | Base |
| 1992 | BMW | 325i | Base |
| 1992 | BMW | 325is | Base |
| 2000 | BMW | 328Ci | Base |
| 1996-2000 | BMW | 328i | Base |
| 1996-1999 | BMW | 328is | Base |
| 1991-1995 | BMW | 525i | Base |
| 1993 | BMW | 525iT | Base |
| 1997-1998 | BMW | 528i | Base |
Why Choose ARP?
- Fasteners trusted in NHRA, NASCAR, and Formula drifting for decades
- Extensive testing ensures strength beyond OEM limits in high-horsepower setups
- CNC machining and heat treatment for exact fit and fatigue resistance
Frequently Asked Questions
- Q: Will this kit fit my 1998 BMW Z3 M Roadster S52 engine?
A: Yes, designed specifically for S52US 2-bolt main caps in 1998-2000 Z3 M Roadster and Coupe models - Q: What material are the studs made from?
A: Forged 8740 chromoly steel with rolled threads for 200,000 psi tensile strength and corrosion-resistant coating - Q: What is the warranty and torque procedure?
A: ARP offers a limited warranty against manufacturing defects. follow included torque specs with Ultra-Torque lube and re-check after 100 miles
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: ARP branded box 12 x 8 x 2 inches
- Weight: 2 lbs
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