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Message: <blockquote data-quote="Super Dragpack" data-source="post: 690068" data-attributes="member: 11187">Hi guys.After all the success of modding the 5.0's, and the death of my Fox when it ran into a wall (not me driving), we now have a new toy - a 2003 GT Convertible Manual with 33k miles and stock in every way. Its a nice car, Shadow Grey, Mach 1000 upgrade, 3.27 diff etc etc etcAnyway, what now?I have planned the following but have a few questions for each. Thanks in advance for any assistance.1/ Cold Air Intake - Any particular CAI that is notably better than others?2/ Drop FRONT suspension 2 inches - Anyone know how much roughly is needed to be removed from stock springs to acheive this?3/ Cat Removal - This is the one needing the most advice. If I remove the cats and replace them with straight through pipes, will the light come on? Will the engine run any better (or worse)? Is it worth doing?  Does anyone know what cats (obviously there are a few) make the most difference and what ones are worth keeping?4/ Is a tuner worth getting and can this help sort issues with the cat removal and any emmisions tests etc? What tuner is the best to get for all round features and tunability?What other mods are worth doing? It is missing a lot of the power I am used to in a 5.0 or 428 engine and I would like to increase it while keeping it streetable obviously.</blockquote>