EGR is totally a non-issue. That's just the easiest way to identify the engines with the different knock sensor.
As said, disabling it is a bad thing... x100 with the supercharger.... unless you can have a perfect tune and consistent fuel. So basically for racecars.
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Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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