http://www.gm.oeaccessories.com/lynchhummer

$725. certainly not cheap compared to some of theother brands ofexhaustsaround, but I liked it based on the sound clip of the touring exhaust.

 

Psycho; do you have the 3.5L or 3.7L? Your spark plug connectors are way different then mine, and I have the '06 3.5L. Where as you have these black blocks on yours, I have metal covers with silver heat sinks on each one. That's very interesting.

Another thing you guys are saying doesn't make much sense. Yes, aluminum doesn't keep heat as long, but you are forgetting that the entire engine compartment is filled with this heat ALL the time, so the dissapation of heat would only matter if the engine compartment was cool after the the pipe heated up, which it never is really. It's constantly surrounded by the engine heat, so wouldn't that make it hot ALL the time? I'm just wondering. I would think plastic would be a better heat insulator all the time. You can always wrap the intake hose also with engine heat insulation. I did that on a couple of my cars and it insulates the hose from the engine heat, and keeps it cooler.

 

That doesn't include S&H either. The friggin' tips are $160 for the two!!![:@]

 

I can't see the price for the GM Intake. I just bought a K&N performance filter. Basically that's what GM does plus some chrome glitz. Filter is $50.

 

the GM intake is $344. I have to admit, I don't see what it really does beside making the tube straight and removing the.......resonator, is it? oh ya, and make everything nice and shiny.

ya, I forgot the price of the tips too. all in all.... ya, rather expensive.

oy, HummerGuy, that gives me a lot to think about. I'm thinking about wiring up a few thermocouples underneath the hood just to check the thermal distribution in there while driving.

 

My two cents on the intake material and under the hood heat; The air is being drawn from outside the engine compartment. The velocity of the air is very fast as the I-5 draws it's air. So fast that I see little to no heat transfer in that short distance. I bet if you measured the temperature at the beginning of the air intake and again at the throttle body it would almost be the same. The higher the RPMs the less significant it becomes. A moot cause IMO.

 

I can't claim to know. I don't really know how these thingswork exactly, which is why I'm curious about them :P