Originally posted by Lordkoo
If Renntech and Kleemann are saying the same result of 20hp to be gained from ECU tunning, why is K1's similar claim is to be any different?
I will not believe anyone's product on a car without before and after dyno runs and long-term follow up.

For example, I can drop 500lbs of weight from my car and my car will feel faster. Did I gain any hp? No. If I ran before and after dynos, will they show a gain? No. Can my car be possibly faster than before if I ran 1/4 miles? Most likely.