Welcome - As for Tuners and Tower Braces, you'll find a lot of information on the Explorer ST High Performance page on FB as well as the Explorer ST Forum. Both are really good and have some good admins. Be careful how you sneeze tho. Piss the right one off and you're gone. However - Back to Topic
1. Tuners:
1a. Adam @ ZFG - Current fastest and probably has the longest line of customer support behind him. 93 and e50 are just incredible. You'll be very please.
1b. Palm Beach Dyno - 2nd or 3rd best option and honestly, you can't go wrong with them. However, some have had issues with Transmission shifting, etc. and they've since gone to ZFG. However, still a very good option. Most customers are pleased.
1c. Gearhead - Been in the game a long time, but new to the ST platform. They've not posted much, but they have tunes. People really like them.
2. Sway Bar - REAR ONLY [EDITED FOR God]
2a. Steeda is your options and the front and rear are very good. They're nicely built. Can't go wrong.
3. STRUT TOWER BRACE - FRONT - STEEDA [Added for God]
For all purchases you can either go through Lethal Performance, Whoosh Motorsports or ZFG directly. Enjoy.