no freaking way, the lt4 kit puts that much HP. I am new to camaro's and seeing a gain like this from a cam change is wierd without having forced induction first. This definately worth looking at.

 

I bought a set of hooker long tube headers for my 97z I was told that they are the way to go. but there not emissions compatible. I have A.I.R. and EGR and was wondering how to keep the check engine light off and pass an OBD II emissions test. if anyone could help me out I would appreciate it

 

It depends on how they run the test in your state. You can have the EGR deleted by tuning the PCM and the MIL wil go off. In places where they only look for trouble codes, it will pass inspection. However; if they also do a visual inspection it won't pass. Also if they put the car on the test dyno, it will fail NOx emision.

 

I just put the hooker long tubes on my car. I installed the o2 sensor extensions for the up stream and put the o2 simulators for the down stream o2 sensors. I removed the AIR pump and all the tubes. however, the egr is another problem. I unbolted the tube from the back of the intake and made a plate to cover the opening and put a gasket between my plate and the intake. will this be ok to leave it like this or does another company make special block offs? I have yet to have the egr and air deleted from the computer but that is the next investment. I'd appreciate any useful input.

 

Kender
You're right, The cam change will not give this kind of power without a good port job. I don't know how much You know about how an engine works, but it's simply an air pump. If You install the cam kit only, You'd be lucky to gain 40+ horsepower. The biggest gain comes from the port job and headers. It's all about the combination of Air in and Air out. Those 12 second LT1 350's and 11 second LT1 383's aren't a mystery, It's all about a good engine package. Don't be too quick to judge without having all the facts. Thanks.