Stage 4Rx has been designed for the 951 or 968 Turbo. Stage 4Rx is for engine sizes of 2.8L.
The new Stage 4Rx uses a new Billet Compressor Wheel.

We recommend using 80lb injectors or larger with the Stage 4Rx performance package.

Each kit comes complete with a Turbo, MAF kit and a Piggyback. All wiring and instructions are included.

Each kit comes complete with a Turbo, MAF kit, MAP sensor, the latest V-MAF+ software and a Piggyback.
All wiring and instructions are included.

Large injectors, 80lb or larger, and a 3bar Fuel Pressure Regulator must be used with the Stage 4Rx

Turbo Billet Comp Wheel Water and oil cooled Direct bolt-on 3" Inlet, 2” Outlet Water Pipe Adapter and Exhaust Studs included. MAF Kit MAF sensor Chip/Board with the latest boost based engine management V-MAF+ software Software pre-configured to support: 91 - 93 octane, race gas and E85 MAP sensor Wiring harness 3" adapter 3" hoses and clamps Air Filter PiggyBack Kit PiggyBack Computer Wiring Harness Bridging Plug Com Cable WIN software and manuals Configuration data Required Items sold separately Injectors 3bar FPR Optional Items sold separately Visual Knock, V-Knock MoMonitor Enthusiast Boost Solenoid

Stage 4Rx: Back Order