Intake spacers?

[BigDaddy13440]

While everything is being torn apart with the new engine, I was wondering if any Throttle Body spacers are worth the investment? I know AirRaid is a popular one, but I've been looking around, and found this:
http://www.amazon.com/Street-Perfor...&newCar=1&s=automotive&vehicleType=automotive

reviews that I've found on other sites are mixed, but most of the negative ones are for installations on Fords ('nuff said!), the 90's and 200's Chevys seem to be legit....

 

[Gzes]

Its not. Worth it. No gains. Save the money for better parts or gas lol

 

[SunlitComet]

does no good for a vortec. all the atomization of fuel is done right at the injector port. and in addition that has got to be the most ugliest one i have seen. looks like it was cast.