Rocker Arms & Tappets

Rocker Arms (Cam Followers) & Tappets – Precision Valve Train Components for Porsche Engines

The rocker arms (also known as cam followers) and tappets are crucial components within your Porsche’s valvetrain system. They convert the rotational movement of the camshaft into the vertical motion that opens and closes the engine’s valves, allowing precise control of air, fuel, and exhaust flow.

At Design911, we offer a complete range of rocker arms and tappets developed for Porsche engines across all generations. Manufactured from high-strength, wear-resistant alloys, these components ensure smooth operation, minimal friction, and long-lasting durability. Whether you’re restoring a classic air-cooled 911 or upgrading a modern GT engine, our quality valvetrain components deliver the accuracy and reliability your Porsche demands.

What Do Rocker Arms & Tappets Do?

Rocker arms and tappets form the mechanical link between the camshaft and the valves — controlling the timing and lift that determine engine breathing efficiency.

Core Functions:

• Transmit camshaft movement to open and close the intake and exhaust valves.
  
• Maintain precise valve timing for efficient combustion.
  
• Reduce friction and wear through precise geometry and lubrication.
  
• Ensure smooth, quiet operation across the rev range.
  
• Support consistent power delivery and optimal performance.

Well-functioning rocker arms and tappets are essential for maintaining engine efficiency, throttle response, and durability.

Why Do Rocker Arms & Tappets Fail?

Continuous exposure to high temperatures, pressure, and friction makes rocker arms and tappets susceptible to wear over time.

Common Causes of Failure Include:

• Oil starvation due to blocked passages or poor lubrication.
  
• Surface wear or pitting from high mileage or contamination.
  
• Excessive valve clearance leading to noise and impact damage.
  
• Camshaft wear causing uneven contact and mechanical stress.
  
• Material fatigue from prolonged high RPM use.

Symptoms of failure include ticking or knocking noises, loss of power, misfires, or excessive valve noise, all indicating the need for inspection and replacement.

Why Replace Valvetrain Components?

Replacing worn rocker arms or tappets restores accurate valve timing, reduces friction, and prevents camshaft or valve damage. Our high-performance, precision-engineered replacements are designed for exact fitment and long-term durability under extreme conditions.

Key Benefits:

• Restores proper valve timing and smooth operation.
• Reduces engine noise and friction losses.
• Prevents premature wear of the camshaft and valves.
• Manufactured from heat-treated, wear-resistant materials.
• Direct-fit compatibility for a wide range of Porsche engines.
  
• Ideal for rebuilds, restorations, or performance upgrades.

A reliable valvetrain system ensures your Porsche runs smoother, quieter, and more efficiently — preserving both performance and longevity.

Highlights:

• High-strength rocker arms, cam followers, and tappets for Porsche engines.
• Precision-machined for durability and accurate valve control.
• Reduces noise, friction, and wear under extreme conditions.
• Perfect for rebuilds, tuning, and classic restoration projects.
• Direct-fit, manufacturer-quality parts for 911, Cayman, Boxster and other models.
• Essential for smooth, consistent engine performance.