Just wanted to let the people with large stereo systems know that the direct replacement alternator from alterstart is excellent! I just received mine yesterday and installed it last night. As soon as I started the car I could tell the difference. At idle my voltage would normally be around 12.6, but now it is at 13.2 at idle. I even have an UR underdrive pulley on! The car is also faster and smoother, and the stereo sounds way clearer, I even noticed that my A/F ratio gauge reacts faster now! well, i would have to say that the $229 was well spent on this alternator. and it was literally drop in! only thing is that they recommend that you change the + wire from the alt to the battery becasue the stock one cannot handle 135 amps. I put a 4 Ga monster cable in.