if anyone needs advice on installing them just post up cause it was simple for me. going in from the bottom is really easy and all that you need to remove is the starter and a sensor. finally got them in at about 9:30 and fired it up... forgot that theres no where for the o2 sensor to go so it wouldnt idle but if i kept the RPMs up it would stay running... and HOLY **** is it loud. just wanted to say thanx to everyone that i asked for help on AIM and that its all done