I've only done a few mods to my 05 GT to date.

Mods:
* 3.90 Motive gears
* JLT CAI
* SCT 91 octane tune

Ok, not a lot so far.

What should my next performance mod be?

 

thats a darn good start!
are there cams avalible for our cars yet?
yoiu could always go with forces induction for $$$
drag slicks would be a great add on for the track

 

Guys, let you all in on a little traction secret.Forget anything else untill you have installed an Airbag in right rear coil.12 psi in bag when racing and empty when not.Will plant rear tires and stop all wheel hop.Only need it in the right rear so buddy up with someone and split the cost because they are sold in pairs.

 

You wont need any of these with a single right rear AIRBAG set to 12PSI.

 

When I ordered my drag launch springs, they only came w/ one air bag for the right rear.

 

On a coil spring car like ours that bag with a pinion snubber is the ticket.Thsi set up here is all you need to go deep into the 10s an even 9,s
Remove front stabilizer bar
90/10 front shocks
Right rear airbag set to 10 to 12 psi(two bags if slick clearance becomes isue)
Solid pinion snubber( I like steedas adjustable one)
Guys, dont get sold on all these nice shiny suspension mods.Put your money were it works not were they say it will increase this add 20 hp here.Rememebr they are trying to push items to make money.