Bolt On's
no list is ever complete, but here is some to get you started

Manufactuer	Description	Product
	Up to an 11 HP Gain! An easy bolt on!!!
	Pick up almost a second on your ET. Pick up some decent horsepower as well.
	FlowMasters live up to there name... They flow great and sound fantastic
	Hypertech offers Chip, Modules and Programmers for all of our truck applications.
	K&N's Filtercharger® can actually double air flow, which, in turn, adds up to 15 extrahorsepower.
	Steps up the primary voltage to 470 volts. More spark = more HP.