This post has been added to
FAQ - Duratec Basics - Read Before Posting.
Below are the most commonly suggested "first" performance mods done to the 2.5 Duratec, and to reduce the number of "I just got my SVT, what should I do first" posts.
Please read the
FAQ - Bolt-on Basics to find out where to purchase and
Search to find more information.
=Remove hoodliner=This will reduce overall engine bay temps.
=Optimize TB=Virtually free for a dyno proven 1-2 hp gain.
=Intake=K&N RU-3530 is the most recommended w/ a MAF adaptor.
=Heatshield=Create a heatshield to isolate your open intake from engine bay heat (heatsoak).
=Maintenance=- Cleaning filthy TB, UIM and LIM will do wonders.
- Replacing old spark plugs & wires, properly gapped plugs
See
FAQ - Duratec Maintenance.
=Remove stock resonator=For 1-3hp gain and better sound, remove the stock resonator and replace with a straight through design. Magnaflow 4" round is most recommended.
=Y-pipe=- Aftermarket, aluminum or stainless
- Optimize the stock y-pipe for better flow. CEGers think this is a DIY mod - it's not (in most cases). You will have to take the y-pipe to someone who can perform the optimization.
=Exhaust=Cat-back brands available are limited. Most affordable and recommended currently is the Tru-Bendz.
=Short throw shifter=B&M or Steeda
=Gutting pre-cats=CEGers have gut the pre-cats ("headers"), especially when they have become clogged.
=Headers=MSDS or Weapon-R
=Chip=Recommended as the last mod as to avoid reburn. ADC is most recommended/used.
=For non-SVTs=SVT TB, SVT UIM, SVT LIM, SVT exhaust
=Other mods=Suspension, brakes, forced induction, 3 liter, etc. can be found in the respective forums.
This is a a work in progress - suggestions are welcome to improve this compilation. 
