Subaru Legacy Forums - View Single Post - Unofficial Legacy GT “Stage Upgrade” Definitions

**Magic** · #1: 11-17-2006, 06:01 PM

I though this would be a good idea to have. These definitions are only a vocabulary to use to better help in discussions. They will help all in determining what level/degree you’re current or desired performance level is at. Hopefully the aftermarket community will use this vocabulary as well for the same intentions. These are loose terms, and by no means official in any way. If you have an opinion as to any changes please pm me to discuss, and keep this thread clean. I will make any and all updates to this first post. I would also like to thank all those involved with helping me do the research to develop this list, Thank You!!!

Please Enjoy!!!

Unofficial Legacy GT “Stage Upgrade” Definitions

Stage 0: Stock with or without; panel filter / intake, or pulley

Stage 1: Stage 0 plus an upgraded ECU map/tune

Stage 1.5: Stage 0 plus a down pipe, and basic stage 2 map/tune

Stage 2: Up pipe, down pipe, upgraded stage 2 ECU map/tune. With or without Stage 0

Stage 2.5: Stage 2 plus a header, cat back exhaust, intercooler upgrade, further upgraded ECU map/tune

Stage 3: Stage 2.5 plus upgraded turbo, and stock fuel system

Stage 3.5: Stage 2.5 plus upgraded turbo and upgraded fuel system

Stage 4: Stage 3 or 3.5 plus upgraded heads or a full engine build

Stage 4.5: Stage 3 or 3.5 with both upgraded heads and a full engine build

Stage 5: Let’s dare to dream!!! Maybe fully built H6 Twin Turbo???

*Having an upgraded wastegate actuator, boost control solenoid, or TGV deletes are just pluses and do not fit into any one “stage” category.

**If you are running a methanol injection system you simply add a “+” to your Stage. I.E. Stage 2.5 +

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