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I have a Park Avanue Ultra 2003 that has the GM 3800 series 2 supercharged v6 engine. Any (preferably cheap) mods that increase performance?

Hi everyone. I am getting a 2003 Buick Park Avenue Ultra (supercharged) in a few days and would like to do some cheap performance mods. I read about performance chips. Are they any good? I also read somewhere that they don't work for supercharged engines. Are there any for supercharged...