ATI ProCharger F-4X-140 Head Unit To F-4X-140-1 Head Unit Send-In Upgrade Service

This is an ATI / ProCharger F-4X-140 Head unit send-in service upgrading your head unit to the F-4X-140-1 head unit! This service is perfect for those looking to upgrade their current head unit. Note: This does not include the F-4X-140 head unit, this is a send-in service to upgrade your F-4X-140 head unit to the F-4X-140-1 head unit.
ProCharger F-4X-140-1 Upgrade Specs:
Maximum Supercharged HP Rating: 3,700 HP (Compared to the F-4X-140 Head unit 3500HP) 
Maximum Airflow: 4,700 cfm (Compared to the F-4X-140 Head unit 4,500 cfm) 
Maximum Boost: 60 psi (Compared to the F-4X-140 Head unit 65 psi) 
Inlet Diameter: 6 inches
Outlet Diameter: 4 inches
Maximum Impeller RPM: 72,000
Internal Step-up Ratio: 4.77:1
Self-Contained Oiling: Yes
Reverse Rotation Available: No