HPP3 and timing tuner?
1. You can overwrite the PPIII tune with another tune no problem
2. You should yank/overwrite the PPIII tune from that thing after hitting the bottle. Their tune is strictly for 100% stock configurations. Don't take the chance. I gained a few HP, but many with slight mods said they lost power too.
3. If you overwrite the tune, I'd return the car to stock with the PPIII first so you can sell it


