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SKU: 201-4305 | UPC: 672036042776
ARP BMW E30 M20 2.5L 6cyl Head Stud Kit 1987-1991 325i 325is 325iX
ARP head stud kit 201-4305 fits 1987-1991 BMW E30 models with M20 2.5L engines including 325i 325is and 325iX. These studs provide consistent clamping force to seal cylinder heads under high boost or compression. Built for reliability in street and track use with precision engineering.
Key Features
- ARP 8740 Chromoly Steel: Heat-treated to 200000 PSI tensile strength for dependable head gasket sealing
- Stud Design: Minimizes main cap and block thread damage while ensuring accurate torque values
- Rolled Threads: Offer 1000% greater fatigue strength than cut threads for repeated torquing
- Matched Hardware: Includes washers and instructions for direct bolt-in replacement
- Multi-Purpose Fit: Handles daily driving track days and drag strip demands without failure
Product Notes
- Inspect head and block surfaces before installation for flatness
- Torque to ARP specs after engine warm-up cycles
- Compact packaging fits easily in tool bags for trackside service
Installation Notes
- Professional installation recommended.
- Apply ARP Ultra-Torque fastener lubricant on threads and under washer faces
- Torque in ARP-specified sequence starting at center studs
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1987-1991 | BMW | 325i | Base |
| 1987-1991 | BMW | 325is | Base |
| 1988-1991 | BMW | 325iX | Base |
Why Choose ARP?
- Decades of motorsport victories prove real-world strength
- Exact-fit kits eliminate guesswork in high-horsepower setups
- Engineered threads resist galling and maintain clamp over time
Frequently Asked Questions
-
Q: Does this kit fit all E30 M20B25 engines?
A: Yes it matches 1987-1991 BMW 325i Base 325is Base and 325iX Base with M20 2.5L six-cylinder -
Q: What material are the studs made from?
A: High-grade 8740 chromoly steel heat-treated to 200000 PSI with rolled threads for maximum fatigue resistance -
Q: What is the ARP warranty?
A: Lifetime warranty against manufacturing defects when installed and torqued per ARP guidelines
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Secure foam-lined box 12 x 7 x 1.5 inches
- Weight: 2.1 lbs
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