The Stage X tune is designed for race level applications and nothing is off the table. It builds on the requirements of the Stage 3 and is intended for engines utilizing at a minimum forged pistons and connecting rods. Each Stage X is specifically tailored to your engine whether it includes a ported and polished head, high performance cams or Garrett/EFR turbocharger. Customization of this nature will require multiple data logging and dyno visits but it is worth the wait. Wheel horsepower increases of 200 to 300 HP and beyond can be expected. Depending on Stage X Handheld applicability each Stage can include three performance maps so you can pick and choose your power level and the options you want activated.
Full customization to include 100+ octane fuel and/or methanol injection are not only included in the cost but highly encouraged.