Lingenfelter L650060505 Lingenfelter Pontiac GTO Air Intake 2005-2006 v4.0b - Manual (Page 5)

Step 8 - The smooth rounded side of the new air box
piece will be referred to as the backside. The front side is
the side that faces the engine.
Step 9 - Locate the 4.0” tube assembly with the flange
welded to it. Push it through from the outside of the
airbox. The weld should be towards the outside of the
box (engine side). Align the cutout in the flange with the
“U” shaped cutout of the airbox. Insert the four button
head screws from the front side. Locate the large flange
with the 4-1/8” Inch hole as shown. Slide it over the tube
from the backside of the air box. This flange should also
be aligned with the cutout in the flange with the U
shaped cutout of the airbox. Secure with four Nylock
nuts as shown.
Step 10 - Install the black “L” bracket as shown. The
M5 button head screws with washers should be installed
from the outside of the box, using the predrilled holes
and the Nylock nuts without washers on the inside. The
“L” bracket with the offset also mounts on the inside of
the box, fasten in the manner explained above.
Step 11 - Using the supplied M6 flange nut, install the
factory Torx head stud (removed in an earlier step) onto
the “L” bracket as shown.
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