Around here I think you will find that most people consider intake, TP/HFC, and catback as bolt ons.
Lots of people think the motordyne and headers don't produce enough results while pullies might help others are concerned with reliability.
You might also throw a tune into the "bolt-on" realm.
HFCs are easy to spot btw... if you look under the car right behind the front wheels where the cats are, the stocks have big ugly heat sheilds around them while aftermarket HFCs and test pipes will not. Generally most cars wouldn't come with them thought because there are issues with EPA fines and inspections.
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