There was a thread about intakes before, and we came to the conclusion that the TB can support a lot more power than what its putting out already. Do the rest of the intake and exhaust first.
If you still want one, you'll need one that works flawlessly with the electronic TB control. Perhaps have a look at BA Falcon TBs?
Perhaps looking at a port and polish of the current TB inside. Its a pretty cheap to do with a dremel.
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