Advise needed.....

What is the cheapest way to get my stock MSP to run the way it was supposed to from the factory? It's been flashed. I haven't been on this board in a while, and I know there are a lot more options now than a year ago for engine management. I don't plan on modding my car, just want to make it run good without the hesitation. I was looking at the Unichip, but would like find a cheaper option. Any advise appreciated.
 
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