X'ed,

Hobbyman just seems like a cranky old man who hates the world. You and I both know that cold air intakes have shown HP gains in all cars that they have been installed on... DYNO's up the *** to prove it... Don't pay him any mind, he always starts this "Well I worked on race cars and I know"... Maybe he worked on cars that had carbureted engines and a big ole' round air filter smack dab in the center.

Now we work with MAF's, ECU's, Injection systems and components that would send an old time mechanic into a panic...

Your estimate of 4-9 hp is right on the button...