Q: Modifying 1999 Buick Regal Grand Sport

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I have a 99regal and i have put a dog load of money in it. The flywheel broke so i am replacing it. While i have my engine out what can i do to improve performance i have 180 degree tstat upgraded coil packs. Best plugs and wires. Supercharger still nothing in return for me. Id like to save money beefing it up but at the same time i know theres alot you can do to these cars just little things and i want to know what they are jts a 1999buick regal grand sport

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