You need to use the search feature!!!!

 

ok....i can never get the specific answer i want that way....sorry though

 

yeah man, you get a cai, you want the air to be cool right? hahaha, so wrap the pipe and thus you'll keep the cold air from outside the engine compartment cool. leaving it unwrapped, it'll just keep the pipe pretty warm and then the air inside it will be pretty warm.

 

i guess that makes a lot of sense...do the plastic ones keep the air any cooler? or would i have to wrap those also?

 

wrap it/ leave it not going to make much difference, also the spacer is a better paper weight than a performance add on

 

A plastic tube simply does not absorb as much heat as a metal tube does.

 

Screw the COI and exhaust crap. The 97 4.6 does not breathe worth a **** internally. You need to get the inner air port working better before a COI will do much. It would be the same price for you to put on used P.I. heads from a newer 4.6 which should get you about 45 more hp conservatively. you will get no where near that out of COI and exhaust. Of course the heads are a bit of a project. And don't forget that if you put PI heads on a non PI motor it will bump compression to about 10 to 1. For me...(living in the mountains at high elevation), higher compression is a good thing because the thin air lowers it.

 

The main reason I ran the S&B

 

Any suggestions on where to find a cold air intake system for a 99 Navi with the 32 valve 5.4L? I have the oval throttle body and no one makes an oval kit yet. I've checked with K&N, AEM, AF1, etc... Help!

 

https://www.f150online.com/forums/ex...take-pics.html

I know K&N makes one for your truck try for the '03 Navigator and that will broaden your options

 

the heat of the intake tube is not going to make any difference, the air is moving through at such a fast rate that it would not have enough time to get hot just from that.

 

that's why the AF1 and the stock intake have the lowest intake temp charges compared to the other intakes according to Mike Troyer and his research...