FX Impact Power Block Upgrade Kit MK1 > MK2

Upgrade Your MK1. Better Airflow. More Power.

The FX Impact Power Block Upgrade Kit is the required upgrade for FX Impact MKI and Impact X owners who want to convert to MKII configuration. Like a ported and polished intake manifold on a high-performance engine, this upgraded valve house improves airflow, efficiency, and overall power capability — delivering meaningful performance gains for shooters pushing higher power with heavy slugs.

Overview

While the Power Plenum expands your Impact's power potential, the rear block is what delivers that power efficiently to the projectile. The Power Block Upgrade Kit replaces the factory MKI rear block with the improved MKII valve house design — reducing airflow restriction, improving efficiency, and unlocking greater power capability across the full power range. Performs especially well at higher power settings with heavy slugs where increased speed and energy are the goal.

Key Features

• Required upgrade for FX Impact MKI and Impact X to MKII Power Block conversion
• Upgraded valve house for improved airflow, efficiency, and power delivery
• Reduces airflow restriction for more efficient air delivery per shot
• Higher power potential — especially effective with heavy slugs
• Ideal complement to Power Plenum and Slug Power Kit upgrades
• Performs best in higher-power tuned Impact setups
  
  

Performance Advantage

• Improved valve house airflow removes the key restriction limiting high-power MKI performance
• More efficient air delivery per shot translates to higher velocities and increased energy output
• Heavy slug performance specifically enhanced by improved airflow and delivery efficiency
• Works like a ported and polished intake — same air charge, delivered more effectively
• Foundation upgrade for building a complete high-performance FX Impact platform
  
  

Compatibility

• FX Impact MKI
• FX Impact X
  
  

⚠️ This kit converts FX Impact MKI and Impact X models to MKII Power Block configuration. Not compatible with MK3 or M3 Impact models.