Installation Manual: GM LT1_A1R13E
Last Updated: February 12th, 2019
Page 12 of 36
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28. Install the supplied MAP extension harness to the MAP sensor before install manifold. Press until it clicks in place.
NOTE: This extension could fit backwards, ensure that the color wires and pin locations match! (Pin
1= Gray, Pin 2=Black, Pin 3=Green).
29. Install the new intake manifold to the engine, pay close attention to the orings, making sure they do not fall out or
move. Do not tighten or secure at this time.
30. Secure intake manifold to cylinder heads using the supplied (9 of 10) 6mm x 65mm SHCS (excluding bolt holding
EVAP solenoid bracket). Leave the #1-cylinder bolt/EVAP solenoid mounting area out until later step. Torque to 89
in/lbs on first pass, follow with a final torque to 130 in/lbs.
31. Route the MAP sensor extension harness down the passenger side of the intake manifold, under the bypass valve
to the stock MAP sensor connector.
32. Install the supplied IAT pigtail to the supplied IAT sensor located at the back of the intake manifold. Push until it
clicks in place. Route the wire along the passenger side valve cover towards the MAF sensor.
33. Drain the coolant from the radiator drain fitting located on the passenger side, bottom of radiator. Install a 3/8” ID
rubber hose to end of petcock and route to storage container. Loosen the petcock to begin draining. Loosen the
overflow tank cap to increase flow.
34. (Complete Kits) Remove the stock spark plugs & replace with the NGK LZTR7AIX-13. Gap the sparkplug at
.035”. Make sure to not damage the electrode during gapping. Torque the sparkplug to 11 ft-lbs as per GM
manual, apply a small amount of anti-seize on the threads. NOTE: Plugs out of the box come at .052”, this will set
misfire codes if not gapped correctly. Competition kits: Discuss which spark plug your calibrator recommends.
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