ARP M3 M11-1.25 X 1.600 Rod Bolt Kit - E30 - S14
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Product Details
In high-revving motorsport applications, the connecting rod bolts are the most critical fasteners in the entire engine. When pushing the legendary BMW S14 inline-four to its limit on the track, factory rod bolts become a dangerous liability.
The ARP Pro Series Rod Bolt Kit is the definitive hardware upgrade for professional race teams, vintage engine builders, and serious track-day competitors. Engineered explicitly to withstand the immense reciprocating forces of high-RPM racing, this kit eliminates rod bolt stretch and catastrophic bottom-end failure.
Key Features & Technical Specifications
Advanced Material Science: Forged from premium ARP2000® alloy steel, offering a monumental upgrade over standard 8740 chromoly and soft OEM factory hardware.
Extreme Tensile Strength: Rated at a minimum of 220,000 psi, providing the heavy clamping force necessary to prevent rod cap walk and maintain perfect bearing clearance.
Proprietary Thread Rolling: Threads are precision rolled after the heat-treatment process. This unique manufacturing step delivers up to 10x greater fatigue life than fasteners threaded before heat treatment.
Optimum Fitment: Specifically sized M11 x 1.25, 1.6 underhead length, serving as a direct high-performance replacement for stock S14 rods (2.3L B23, 2.5L Sport Evo, and stroked variants).
Complete Kit: Includes a full set of 8 precision-engineered rod bolts and a packet of ARP Ultra-Torque Fastener Assembly Lubricant.
Why Racing Teams Trust ARP for the BMW S14
The Problem: The S14 engine is celebrated for its high-revving nature, but sustained operation above 7,000 RPM creates extreme inertial loads. OEM stretch bolts experience fatigue and permanent deformation under these conditions, causing the rod cap to shift, destroying bearings, and throwing rods through the block.
The Solution: The ARP kit provides an unyielding clamping force that anchors the rod cap perfectly to the rod body. Its superior resistance to cyclical fatigue ensures that your bottom end stays structurally sound, whether you are running endurance stages or sprint races.
Prop 65 Warning
