Stage 4 for the Mazda 6 MPS takes the vehicle to the levels you can only imagine. It includes everything in the Stage 3 kit, plus a turbo upgrade and the autotech engineering forged internal pack designed to handle and deliver the power that the Stage 4 turbo can produce.

ECUTEK Custom Tune
CPE Cold Air  Intake with Turbo Inlet Hose
High Pressure Fuel Pump
CPE Quickspool Downpipe with highflow cat
3" Cat Back
3.25" Top Mount Intercooler
Stage 4 Turbo Upgrade
Forged Pistons and Rods