i lookin to buy this plenum spacer pictured below. i see it has the gasket that goes underneith. not really sure what its called. is it neccissary that i change that one out? i see that some kits dont even come with it. so do i need to even use it?

 

Pretty sure the lower plenum spacer is the part you are referring too. Once you remove the upper you will see the lower, from what I have read it's to keep heat soak down? Not positive on all this, don't have one ... let someone else chime in for help.

In this case no you don't need to... but why pay for it and not use it?!

 

you do not need it. its a aramid gasket that helps reduce heat. it helps but its not needed

 

ok thanks.

 

This is the ISO Thermal kit.. you can save a couple of bucks and just get the spacer kit.. it the same minus the Aramid lower plenum gasket and the manual heater shut-off valve that you have to splice into your cooling system... I started out with the basic spacer kit and eventually upgraded to the Copper ISO Thermal kit, this includes the copper heater plate that goes between the TB and upper plenum intake to keep the throttle plate from icing up here in the mid-winter tundra we can get in Ohio.. no splicing required or turning off/on as the seasons change!

The basic spacer kit will suffice... it's the cheaper option of the three.

 

so with the kit that i posted the picture of. is there any gain from running the hole thing? im in california so its not freezzing here in the winter

 

Just get the basic kit. For Cali it will work just fine and save you a little $$$