11331709063 Engine Valve Rocker Arm valve rocker shaft BMW E30 E36 E34 E32 E31 87-96 Engine

Engineered to exact BMW specifications, this OEM rocker arm delivers reliable valve train performance for multiple classic BMW platforms including E30, E36, E34, E32, and E31 models produced between 1987-1996. The precision-crafted component ensures optimal valve actuation and longevity in both daily-driven and performance applications.

Key Features and Technical Advantages:

The rocker arm's forged construction and precision bearing surfaces provide exceptional durability under continuous operation. The hardened contact pad and roller follower design reduces friction while maintaining precise valve timing across the entire RPM range. This OEM-quality replacement part restores factory performance characteristics while offering improved wear resistance over original components.

Performance Benefits:

1. Precision Fitment – Manufactured to exact BMW tolerances for seamless installation in:

   • E30 325i/is/iC (1987-1991)

   • E36 325i/is (1992-1995)

   • E34 525i (1989-1995)

   • E32 735i (1987-1994)

   • E31 850i (1990-1994)

2. Enhanced Durability – Features include:

   • Case-hardened contact surfaces

   • Precision-machined pivot points

   • Optimized oil passage design

3. Improved Valve Train Stability – The balanced design ensures:

   • Consistent valve lift

   • Reduced harmonic vibration

   • Maintained timing accuracy

Technical Specifications:

• Material: Alloy Cast Iron

• Surface Hardness: 58-62 HRC

• Bearing Type: Precision roller follower

• Weight: 147g ±2g (balanced set)

• Compatibility: M20B25, M50B25 engines

Applications:

• Factory restoration projects

• Performance engine builds

• Daily driver maintenance

• Vintage BMW preservation

• Track/competition use

Verified Performance:

• 30% longer service life than aftermarket alternatives

• Maintains precise valve clearance settings

• Reduces valve train noise

• Improves oil flow to critical surfaces

This genuine-equivalent rocker arm delivers OEM-quality performance with enhanced durability characteristics. The precision manufacturing process ensures perfect compatibility with original BMW valve train components while the upgraded material specifications provide improved longevity for both stock and modified applications. Properly torqued and adjusted, these rocker arms restore factory-quiet operation while withstanding the demands of high-mileage service.