I am about to do the basic mods to my otherwise stock 2003 Cobra and have a few questions. I tried searching these topics as I am sure they have been covered several times before, but I had trouble finding threads that answered my questions. If anybody has any search terms I could use, that would be great. I am looking to change the intake, blower pulley, the exhaust and tune the car. I am planning on going with a JLT intake or something similar. I am going with either a 2.5 or 3 inch O/R x pipe and catback. What size pulley can I use on the stock blower and still safely run 93 octane pump gas? Would this require an idler change also? The blower pulley is what I have the most questions about. Also any good combo advice about the other parts would be greatly appreciated. Thanks for your time.