It is basically a direct swap from old to new (prochamber)... Spray some liquid wrench, wd40 etc...on the bolts to help you loosen them up... I pulled down the old H with the 02 sensors still connected to the pipe because I just unplugged the sensors...then I placed the 02 sensors to the Prochamber... Also if you get a Prochamber check it over and make sure there is no "missed" welds that could lead to an exhaust leak... Remember to get the driver side stud... A friend helps a lot on the install...to hold the pipe for you, etc... I used the Dallas Mustang MIL's (plug and play)...and had no engine light and ran fine...seemed to run a bit rich after the swap but I can't complain at all...
sorry to bring this thread back up but what is the drivers side stud? Do i need to buy it for the install? why doesnt MAC give it to us?
Well since you have a 99 you will need it as far as I know... There are two manifold studs on your manifold that are used with the nut to bolt the manifold to the h-pipe... If you don't replace it (the stud has a spacer on it)...it will cause a leak because you can't seal it up completetly...I think the NAPA stud part number was mentioned earlier in this thread...if not do a search and it should come up...alls you do is take out the stud with the spacer on it and put the new one in... Don't know why Mac doesn't give it you ya...
