Native IS20 Vehicles (Golf GTI, Jetta GLI, Audi A3)Stage 1 & 2 - All stock fueling equipment for 91, 93, E30- HPFP Required for E85Stage 2 IS38 - All Stock Fueling Equipment for Pump Gasoline (91/93)- HPFP Required for E30- HPFP Required for E85- LPFP Highly Suggested for E85Vortex Std / XL - HPFP Required for Pump Gas- HPFP + LPFP Required for Ethanol Content UP TO E40 (tuner may advise higher or lower during your tuning session)- MPI + LPFP Required for Ethanol Content GREATER than E40 (E60, E70, E85, etc)- If you previously had an HPFP installed, you do NOT need to remove it if you go to  MPI/LPFP. But it is not required and you may be able to recover some costs by selling it and reverting to a stock HPFP.EQT Typhoon- MPI + LPFP Required. (Pump gas or Ethanol)- If you previously had an HPFP installed, you do NOT need to remove it if you go to  MPI/LPFP. But it is not required and you may be able to recover some costs by selling it and reverting to a stock HPFP.- EQT LPFP Pro Brushless Pump Required. Native IS38 Vehicles (Golf R &  Audi S3)Stage 1 & 2 - All stock fueling equipment for 91, 93, E30- HPFP Required for E85Vortex Std / XL - HPFP Required for Pump Gas- HPFP + LPFP Required for Ethanol Content UP TO E40 (tuner may advise higher or lower during your tuning session)- MPI + LPFP Required for Ethanol Content GREATER than E40 (E60, E70, E85, etc)- If you previously had an HPFP installed, you do NOT need to remove it if you go to  MPI/LPFP. But it is not required and you may be able to recover some costs by selling it and reverting to a stock HPFP.EQT Typhoon- MPI + LPFP Required. (Pump gas or Ethanol)- If you previously had an HPFP installed, you do NOT need to remove it if you go to  MPI/LPFP. But it is not required and you may be able to recover some costs by selling it and reverting to a stock HPFP.- EQT LPFP Pro Brushless Pump Required. Native IS12 Vehicles (1.8T MQB / AllTrack / SportWagen)Stage 1 & 2- All stock fueling equipment for all octanes (91, 93, E30)Stage 2 IS38 - Vacuum Pump Conversion HIGHLY Suggested w/ Upgraded HPFP- 91/93 May Max out the stock fueling system depending on age & condition of the vehicle- MPI Supported on select Vehicles (Contact sales with your Ecu ID / Box code to confirm)Vortex Std / XL - HPFP + LPFP Required Pump Gas- MPI + LPFP Required for Ethanol (Any Content)- If you previously had an HPFP installed, you do NOT need to remove it if you go to  MPI/LPFP. But it is not required and you may be able to recover some costs by selling it and reverting to a stock HPFP.