from my experience and all my mods. the timing adjuster is one of the top few bolt on's that gaurantee's noticable power. it's only like what, 160$?? Alot of guys see an instant 7-10RWHP gain, and 7-10RWTQ gain, I know I did. and for how easy the install was, it's worth every penny, YES a chip will do the same thing, but once your timing is advanced, you can't touch it unless you tune it again, the T/A is very easy to adjust, it took me about an hour to install. If you don't wanna mess with the hassle of a mail order chip etc, or spending hundreds of dollars on a dyno, slap a timing adjuster on and get your instant power and low end torque!