Here's the Evergreen Poweraid in the box. I purchased the Poweraid from Truck Performance for $96.50.
Here are the contents of the box.
To install the Poweraid first remove the air cleaner duct and the throttle body cover.
I used Permatex RTV instead of the included gaskets. People report that using RTV cuts down on the whistle sound of the Poweraid. I let the RTV set up and get tacky while I disassembled the throttle body housing.
I used Permatex Ultra Black RTV on the Poweraid housing. It is 'sensor safe'. I used anti-seize on the bolts.
The throttle body has four 8mm bolts. The replacement bolts are 10mm.
The throttle cable bracket has two 10mm bolts.
Yuck! The inside of the throttle body was oily from the crankcase ventilation. I cleaned this well. I hate the idea of the engine sucking this garbage in.
The kit includes two extension brackets for the throttle cable bracket.
The Poweraid and throttle body are assembled with the longer replacement bolts.
The entire mess is buttoned up. The Poweraid is visible. The entire installation took around 45 minutes, including taking pictures.
The theory behind the Poweraid is that the spacer adds velocity to the incoming air, and the helix in the spacer causes the air to spin and pack more air in the runners. After I've used the Poweraid for awhile I'll report my results.
Results: The Poweraid seems to help in the 2000+ rpm range. You can feel the engine start to pull a
little harder. Noticeable, but not dramatic. Highway gas mileage increased a little, but not much. It didn't
help much on the 'around town' mileage. A side benefit of the installation is the
'slop' is taken out of the throttle and transmission cables. This seems to have helped throttle
response and shift timing.
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