Basically,when you start doing mods to your engine(intake&exhaust etc.),look at it this way,you are making the engine breath better. It will be seeking more "food".
Most times,the initial findings after mods will show the engine running lean.
Adjustments are made in the tune to change this.
IMO,don't expect any big power surges after a tune from the mods you have listed.
In fact,you may not notice any big differences.
You may want to do a few extra mods before you go to the expense of a tune.
I suggest you consider HFC's or test pipes (if the law allows)before a tune is done.
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