Extreme Composites
170 Inwood
Dr
Rockdale,
TX 76567
512-446-6117
Z78 Hood
TBI Airbox Installation
Caution: Ram air kit is not intended for severe wet
weather such as flooding. Do not flood scoop with water when washing truck or
any other time. Excessive water in air
box from any source will cause severe engine damage.
1.Trim air filter opening to fit a K&N air filter #
33-2056
2.Trim throat approx. 1/2 inch longer than pencil line. Turn
air cleaner bolt so it does not interfere with fitting. Test fit by closing hood with air box in
place. Trim or sand until hood will close and air box is evenly spaced 1/2" from hood.
3.Drill 1/4 inch hole 4 inches down and centered on back side
of air box. Bend air filter bolt so it
matches hole. Remove bolt from throttle body while bending. Fabricate bracket
to hold front of box in place. It should support the front of the air box and
mount to the front of the intake manifold. Use RTV silicone to form a gasket to
seal air box to throttle body
4.Mark inside of hood and cut hole to match air filter. (a
hacksaw blade works good) Cut open upper scoops and glue screen in place. Use
fiberglass reinforced body filler. Attach a foam gasket to top of air box to
seal to hood to air box.
5.Remove intake hose for the PCV System from the air filter ring on the throttle body. The intake hose will be on the opposite valve cover of the PCV Valve.
NOTE: If this intake hose if left on, the ram air pressure
can blow out your rear main seal.
6.Install a filter on the valve cover hole where the PCV
intake hose was. You can use K & N
filter # 33-2050.
.