SKU: 201-6104 | UPC: 672036032791
ARP 1988-1991 BMW E30 M3 S14 Rod Bolt Kit
ARP rod bolt kit 201-6104 fits the BMW E30 M3 S14 2.3L engine from 1988 to 1991. These high-strength fasteners replace OEM bolts to secure connecting rods under high-rpm stress. Built for durability they maintain clamp load through heat cycles and high horsepower applications.
Key Features
- ARP2000 Alloy Steel: Rated at 200,000 psi tensile strength resists fatigue and stretching in boosted or naturally aspirated S14 builds
- Rolled Threads: Processed after heat treatment for 1000% greater fatigue strength than cut threads and accurate torque values
- Precise Fit: Application-specific dimensions match BMW S14 connecting rods for drop-in replacement without machining
- Complete Set of 8 Bolts: All hardware included covers full inline-4 engine reassembly with matched components
- Track-Proven Design: Handles street driving track days and drag racing with consistent performance
Product Notes
- Inspect connecting rods for wear before installing new bolts
- Apply ARP Ultra-Torque lubricant on threads and under bolt heads
- Compact lightweight kit ships quickly without oversize fees
Installation Notes
- Professional installation recommended.
- Torque to ARP specs: 59 ft-lbs initial plus 90 degree angle turn using ARP lube
- Re-torque after 500 miles or first heat cycle
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1988-1991 | BMW | M3 | Base |
Why Choose ARP?
- Brand standard in motorsports from NHRA to endurance racing
- Extensive testing ensures bolts outperform stock under extreme loads
- Precision manufacturing guarantees repeatability in every kit
Frequently Asked Questions
-
Q: Does this kit fit all 1988-1991 BMW E30 M3 S14 engines?
A: Yes ARP 201-6104 bolts are direct replacements for OEM M10x1.5x70mm rod bolts on all US-spec S14B23 engines in E30 M3 models. -
Q: What material and strength rating?
A: Forged ARP2000 8740 chrome moly steel heat-treated to minimum 200,000 psi tensile strength with rolled threads for superior fatigue resistance. -
Q: What warranty applies?
A: ARP offers a one-year warranty against manufacturing defects when installed and torqued per instructions.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Compact box 6 x 4 x 1 inches
- Weight: 0.31 lbs
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ARP (Automotive Racing Products) is the world’s premier manufacturer of high-strength engine and driveline fasteners—head studs and bolts, main studs, rod bolts, and more—engineered and manufactured in-house from start to finish for race-proven reliability. With vertically integrated processes that include cold heading, machining, heat-treating, thread rolling after heat treat, and rigorous QA, ARP maintains aerospace-level certifications (ISO 9001 and AS9100) and validates every part for repeatable clamp load and fatigue resistance. Signature alloys such as 8740 chromoly, ARP2000, L19, and Custom Age 625+ deliver ultimate tensile strengths up to the super-alloy range, while ARP Ultra-Torque fastener assembly lubricant helps achieve consistent pre-load during installation. From street performance builds to professional motorsport programs, ARP fasteners provide precise fitment, superior metallurgy, and the durability needed to keep engines together at elevated cylinder pressures and...
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