I just bought my 1999 Dodge Ram 5.9L 4x4 ext cab off my brother last friday and im looking into gettin a cold air induction and ive always been a fan of K&N FIPKs but ive been lookin around and seen that Street and Performance makes an Airmax system with a powertower http://www.streetandperformanceelectronics.com/lead.htm[URL] and i wasnt sure which was better does anyone have this on their ram or possible know somebody that has?

To go along with my intake im going to purchase the Flowaster American Thunder Series #17209, and the Hypertech Power Programmer.

Also, what are your opinions on throttle body spacers do they actual provide gains or are they just garbage?