How can I get more performance and horsepower out of my 1998 buick lesabre limited?

I was just wondering how I could get my car to be faster without sacrificing MPG. I was looking on ebay and saw these chips that they say increase MPG and add horsepower. They run about 25 bucks or less and they say they just plug right in to your car. They say they are safe. Do they do what they claim to do or can they damage my car. I know it's not going to be a race car but I just want to unlock my engines potential (GM 3800 SERIES II V6 ). Is there anybody who has experience with the performance chips they sell on ebay? Or anybody who can tell me an inexpensive and safe way to get more performance out of my car? Or someone who can explain the pros and cons of these chips.How can I get more performance and horsepower out of my 1998 buick lesabre limited?I have the same engine in one of my cars. yes, there is a chip you can get however, it wont increase the power that much. However there is a bolt on turbo that fits on that engine with no modifications it was offed as a extra in your model You can install it yourself in about 1 hour. I have one on mine and it works great! You might find this turbo at a salvage yard on another 3800 as many models had one. Hope this helps you!How can I get more performance and horsepower out of my 1998 buick lesabre limited?There is a small amount of power increase with a performance chip. The engine itself, mechanically, starts to destroy it's self. 3800 GM engines were at one time supercharged (much more power than a chip alone can do) but the engine design did not let it last for long. The best way to get more performance out of your CAR is to strip all unnecessary weight from it.