I know that there is a similar thread already started but I did not want to highjack it. I have a quick question about a product I saw on Ebay. They are the resistor chips that claim to give you between 18 and 25 more horses and increase your tourqe. Do they work? What is the ideal intake temp for a 2001 Sierra with a 5.3l engine. I have alredy put in a K&N air intake and am also looking at a Helix tower of power. Any feedback would be great. Thanks.

my friend got one of those for his jeep. it's just a resistor that you put into the temp sensor. it kills your gas milage. his dropped to about 12 from 17. you do get power but it's not worth the loss of milage. if you still want to do it go on the auction and see what resistance it says go to radio shack and buy a 5 pack of them for 99 cents and stick the ends into the 2 outermost slots of the conection and plug it back in.

Thanks for the info.