I have 2 different cold air intake boxes cover and they are different..wich one to use and why?


Those open

Classic

 

Your guess is as good as ours without giving us any information on your vehicle.

 

Ahh yes sorry about that...

its a stock 98' 4.0 auto

 

I would run the 2nd one since its stock im not shure what the deal is with those flappy doors on the first one but seems to be some kind of relief valves to release back pressure so the box don't blow up lol

 

Yeah....those doors look like waste gates for a supercharger! Something that supplies constant pressure not controlled by engine rpm, like a high speed electric fan. Anyway, it's not needed for a normal breathing 4.0.

 

I've never seen such a weird contraption either and could only think it would be fore something like that. But generally neither a turbo or supercharger would use the airbox.

So while not useful.. I'd keep it as a conversation piece or see if maybe a guru knows.

Is there a part # underneath?

 

by the looks of it I think its just a stock one that has been modified for some reason

 

Meet George Jetson LoL....... I'm with tiny you can see the ribs under the flaps on the top , purpose unknown seems you would have to prop them open for any extra air to flow .

 

To equalize pressure during a Tornado. Haha

 

It's a mod to handle backfires blowing up the airbox.
Weird to see it on a Jeep.

 

Good call ! yea weird on a 6 popper unless it was built to drag race seen a Chevy 230 -6 do nines - back in the day, ( no it wasn't a Wednesday, it was a Saturday night @ Thornhill KY)