His distortion is pure MESA Triple Recto.
His clean tone is all Fender with a TC Electronics GForce through that.
And he has no other pedals on his pedal board besides his Wah, and a CAE RS10 MIDI Audio Controller.
For more information:
http://www.tremonti.net/equipment.htm
The amps/effects section is near the bottom. There are a couple of diagrams outlining his entire Rig. Check them out.
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Ford motor credit company specifications
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Ass gorgeous