The boss intake im made of a compositematerial: just like the stock one is you think you do the same gains on a stock intake manifold that was ported

Boss has some portable aspects to it unlike the factory intake.

Here's a graph to show the gain of tq it made through out the graph. It picked up as much as 20 rwtq in spots.

http://i1292.photobucket.com/albums/...psc5a9b274.jpg

Would you get more hp by switching to a cobra jet manifold with a single blade throttle body?

A bolt-on car you'll see next to nothing. The CJ intake gives up even more TQ than the BOSS and see's HP gains at an even higher RPM (around 7500+) than the BOSS. Jeff's car.....yes.