I did this by myself and it was a bit tough to get it done. I did the soldering, but do not buy that cold heat shit because it does not work well. I was able to complete the soldering except that brown sob cable, but i am going back next week with a new soldering gun and get it completed. As far as performance it is noticeable righ away and the power just keeps coming on constant basis. It seems to me that the engine is smooth and quieter. :drool: I really like it, hope to enjoy it more.