SKU: 201-4605 | UPC: 672036041533
ARP 1988-1991 BMW M3 2.3L S14 Head Stud Kit
ARP head stud kit 201-4605 upgrades the cylinder head fastening on 1988-1991 BMW E30 M3 models with the 2.3L S14 four-cylinder engine. These studs maintain secure clamp load under high cylinder pressures from boosted or high-rpm setups. Built for daily drivers and race cars needing dependable head sealing.
Key Features
- ARP2000 Alloy Studs: Rated at 220,000 psi tensile strength to handle extreme boost and nitrous applications without stretching
- Stud Design: Distributes torque evenly across block threads to prevent damage and ensure repeatable accuracy
- Precision-Rolled Threads: Provide maximum thread engagement for consistent clamping and resistance to fatigue
- 12-Point Nuts: Included with hardened washers for precise torque application and secure locking
- Application-Specific Kit: Complete set with parallel ground washers tailored for S14 head installation
Product Notes
- Inspect head gasket surface flatness before installation to achieve proper sealing
- Use ARP Ultra-Torque lubricant on threads and under nut faces for accurate torque values
- Ships in protective ARP packaging to prevent damage during transit
Installation Notes
- Professional installation recommended.
- Torque to ARP specs: 60 ft-lbs initial then 75 ft-lbs final in sequence. recheck after 500 miles
- Compatible with OEM head bolts holes. no machine work required on E30 M3 blocks
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1988-1991 | BMW | M3 | Base |
Why Choose ARP?
- ARP fasteners power NHRA and SCCA champions with proven reliability
- Every stud undergoes rigorous testing for strength and fatigue resistance
- Engineered in the USA with exact fitment for BMW S14 applications
Frequently Asked Questions
- Q: Will this kit fit my 1988-1991 BMW E30 M3 with S14 engine?
A: Yes ARP 201-4605 is direct fit for all US-spec 1988-1991 BMW M3 2.3L S14B23 engines including Evolution models - Q: What material are the studs made from?
A: ARP2000 proprietary alloy with 220,000 psi tensile strength and black oxide finish for corrosion resistance - Q: What is the warranty and torque procedure?
A: Lifetime warranty against manufacturing defects. follow ARP torque sequence with Ultra-Torque lube for 75 ft-lbs final torque
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: Secure ARP box measuring 9 x 7 x 2 inches
- Weight: 1.98 lbs
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