LG Motorsports LG Pro Long Tube Headers - Manual (Page 7)

You can now install your spark plugs and plug wires. Make sure that they click once
onto the plugs, and twice onto the coil packs. You can now also re-install the dipstick
and dipstick tube.
*We do suggest one final tighten after the headers have went through one heat cycle.
They should never have to be done again.
Now that the headers have been installed, slide one 3” clamp over each collector
and install your high flow cats or your off-road pipes. Once these are on, slide over one
more 3” clamp on each of these pieces. You can loosely tighten the clamps down, but do
not tighten all the way until the entire system has been hung in place and adjusted. The
remainder of the exhaust will look like the layout shown in figure 12.
Figure 12: Rear S pipes, X pipe, mid section and optional mufflers
Start by installing the rear 02 sensors into the post cat pipes. These ‘S’ pipes will
slide over your high flow cats. Again, slide another 3” clamp onto each of these pipes
and install your X pipe. Once the X pipe is on, again slide the 3” clamp over each side
and now install your rear mid pipe and place it into the rear hanger just under the
differential. You can also plug in your rear 02 sensors at this time and tie out of the way
if needed. Follow along in the figures below for the mid section assembly.