For LT1s especially, which suffer monumental heat soak with the stock aluminum intake, a lower temp thermostat like our $20 Hypertech 160-degree PowerStat can make a world of difference on the dragstrip. In switching to the Hypertech unit, coolant will begin flowing into the heads at a more mild 160 until the unit is fully open at 175. Cooler intake manifolds and cylinder heads translate to decreased ETs and increased mph (not to mention resistance to detonation). The 160-degree stat will also come in handy later when the fan activation temperature is modified through tuning, which is why most tuners such as Ed Wright of Fastchip recommend or require it.
Once again, Crazy Horse Racing in South Amboy, N.J., would be doing the wrenching on this one, since a years-past crime of passion still prevents your author from legally using a sawzall. Following this install and dyno test, we will again head to our home-away-from-home, Englishtown, N.J.'s Raceway Park for a comparison drag test.
To begin installation of the airfoil, the clamps on the intake elbow are loosened and it is removed. Since we planned to replace the stock airbox with a K&N FIPK, Glen Knell of Crazy Horse removed the entire intake tract. A #20 Torx screwdriver was used to remove the LT1 plaque on the throttle body. | 
The aluminum wedge nut slides in the little gap behind the face of the throttle body as shown with the flat side facing back, the airfoil is put into place, and the screw is threaded through it and into the wedge nut. Thunder says you may need to lightly sand the edges of the wedge nut to get it to fit due to some variations in throttle bodies, but in this case it wasn't necessary. | 
Finally, the screw is tightened with an Allen wrench until it is good and tight. The LT1 plaque, of course, can go back on as well. |
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Some coolant needs to be drained before removing the housing on the thermostat with a 10mm socket. | 
If you drove an hour on the New Jersey Turnpike, like I did before doing this install, the thermostat may be a touch hot when you go to remove it. A rag and a flathead screwdriver will save a trip to the emergency room. |