How much does it cost to dyno a car? If its not going to be too much I'd like to dyno mine before and after I do the mods so that we can have hard data for these types of arguments.

 

Every shop is different, but Google search and join your local/state Camaro/F-Body club, many of them have an arrangement with a shop that does a "dyno day" where the dyno tests are free...

MFBA does them see:
http://www.mfba.org/

 

Gut the cat whats that mean?

 

It means to hollow out the catalytic converter. Therefore increasing exhaust flow.

 

wouldn't that be the same as just removing the catalytic converter
and wouldn't removing it be easier?

 

yes but it helps with making it look like you have cats for inspection

 

Just me being dumb but didn't SLP put out a RS package with several of these mods? If I remember right they only estimated a 5 HP gain.
I have 2 questions
What is a CAI?
IF I guted my cat would that screw with the before &after O2 sensor? I assumed it was looking for some change in O2 level?

 

Cold Air Intake (CAI). gutting the cat would only screw with the after cat sensor, as it would be the only one to see any change.

 

Depending on the miles and such... I'd say about 200 RWHP.

 

I may just be ignorant, but it seems to me that increasing inhale and exhale of a 3.8L should add more than 10 HP. Technology and exhaust components built in the early 1990s shouldn't be near comparable to the design of a modern bolt on part. But then again, I'm not a doctor, I don't know. I do, however, know that adding a SLP CAI GREATLY improved response throughout the entire powerband. Something that I don't think 3 and a quarter HP would do...