im getting the car dynoed when in a week or so does anyone have any idea roughly how much rwhp i should expect from a 95 lt1 motor with a ported maf, long tube headers, magnaflow 3" cat back, cold air intake, and 3.23's. I dont know it it will make any difference but the car does have a shift kit but im not sure of the brand as it was installed by the previous owner.

 

Spring the extra few bucks for the wideband hookup to make sure you aren't hurting things with that hacked up MAF.

The MAF is a MEASURING DEVICE, you go grinding on it you messup calibration. With the calibration messed up the engine may not get proper fueling.

 

Well my 96 with headers/new cats, intake, no internals, dynoed 268hp and 300tq, with out the NX.

 

That seems a little low, you should do some data logging. Unless you bought some really bad shorty headers and are running a flowmaster.

 

I will be getting cut-outs here shortly. He said that we could get some more power out of it, at this time I really just don't have the money for tuning/Dyno time.