I put in a stock protege engine with 20,000 miles on it, My original engine has 9,800 miles on it. After 3,000 miles of driving on the stock protege (of course with all MSP components/like turbo stuff on swtiched onto it) engine I switched to MSP plugs. The car is very quick and even quicker now. The only change I see is that the timing belt could use to be a little tighter on this motor than my original motor. I have a 0-60mph spot, that I test and tune at. I shaved 70ft distance by putting in the MSP plugs, which I was curious because everyone said the base model proteges ones are better because they dissipate the heat better than the platinum, which maybe true, however there seems to be better explosion with the newer plugs. I also forgot to mention I changed the coils, and the wires too, although factory stock parts, but 14,000 miles less time on them. I estimate my 0-60mph time to be around 5.9 now and was around 6.9. Reaching 60 around 5600 rpms in 2nd gear and I also find that the car is much quicker short shifting than taking it to the redline. I need to adjust my turbo though because it seems very mild, not really kicking in till around 5,000 rpms, so I'm only seeing around 800rpms of explosive power. Never had a turbo car before, but have etensive background in roadracing and motocross. I'm guessing my boost is set very mild for stock. It's my understanding it can vary from car to car. I'f I get it to engage sooner should be able to get around 5.5 seconds 0-60mph times, which is pretty good for a stocker. Also going to zero plus tires should help times, but I haven't been able to find anyone that knows what would be the appropiate zero plus tire and being in the midwest, everyone is pretty much sports car illiterate here. It's circle track stuff here.