The Proton Gen-2 is a compact car developed by Malaysian automaker Proton, and it was the first model to use the CamPro engine—an in-house engine developed in collaboration with Lotus. When people refer to the ''CamPro intake manifold'' (sometimes misspelled as ''intekmaniful''), they’re usually talking about the intake manifold design used in the CamPro engine, which had some known performance characteristics and revisions over time.

CamPro Intake Manifold Description:

1. 

Design and Function

• The intake manifold on the original CamPro engine was a fixed-length manifold, made from lightweight plastic/resin composite.
• It is designed to distribute air evenly to the engine’s cylinders and to optimize airflow for combustion.
• On early models, the design had a long, straight runner layout, which was more optimized for mid-to-high RPM performance.

2. 

Performance Characteristics

• The original CamPro engine with its intake manifold design was criticized for a noticeable torque dip in the low- to mid-RPM range (~2,500 to 3,500 rpm), making the car feel sluggish at lower speeds.
• To resolve this, Proton later introduced the CamPro IAFM (Intake Air-Fuel Module) and then the CamPro CPS (Cam Profile Switching), which included a variable-length intake manifold to improve low-end torque.

3. 

Aftermarket Modifications

• Many Proton enthusiasts modify or replace the intake manifold to:
  
• Improve airflow and reduce the torque dip.
• Add aftermarket variable intake systems.
• Enhance performance with tuning or forced induction (like turbocharging).
• 
  

Summary:

The CamPro intake manifold in the Proton Gen-2 is a key component of the engine’s air induction system. While it had some early issues with torque delivery, later revisions and aftermarket upgrades significantly improved its performance. If you’re considering a performance upgrade, swapping to a CPS or IAFM intake manifold or using an aftermarket option could enhance drivability.

Would you like a diagram or visual breakdown of the manifold system?