ATI ProCharger F-1A Head Unit  To F-1A-91 Head Unit Send-In Upgrade Service

This is an ATI / ProCharger F-1A Headunit send-in service upgrading your headunit to the F-1A-91 headunit! This service is perfect for those looking to upgrade their current headunit. Note: This does not include the F-1A headunit, this is a send-in service to upgrade your F-1A headunit to the F-1A-91 headunit.
ProCharger F-1A-91 Upgrade Specs:
Base HP Range of NA Engine: 300-500 HP
Maximum Supercharged HP Rating: 1200 HP (Compared to the F-1A Headunit 1100HP) 
Maximum Airflow: 1,600 cfm (Compared to the F-1A Headunit 1,575 cfm) 
Maximum Boost: 38 psi
Inlet Diameter: 3.75 inches
Outlet Diameter: 3 inches
Maximum Impeller RPM: 74,000
Internal Step-up Ratio: 5.40:1
Self-Contained Oiling: Yes
Reverse Rotation Available: Yes