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I'm also on the fence. If you melt the harness it can be a 5-figure repair. The stock headers are good and likely better than 4>1 headers below 4500 rpm or so. I am also not a fan of defeating emissions equipment, and there's no way headers + removing the primary cats is legal.
Then there's a LT2 intake, larger TB and intake plus a tune. Do all of this for thousands of dollars and some real risks to reliability and you'll get maybe 40 hp. I've ran side by side on track with a car with these mods and being a regular SS with race seats it was about 200 lbs lighter too. On the back straight at HPR going from 75 to about 130-135 mph this gets you 1-2 car lengths. Add back that 200 lbs and it's even less.
Modern engines are much more efficient than they used to be and you won't gain power without some trade offs.
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