So I got a friend with an '01 Saturn L300 V6 and he's got a cone air filter on it, and the thing is so loud, when he's in front of me I can hear him from inside my jeep with the music on, everything else is stock. Without the cone it sounds like a normal car btw.
So ya know, I want my heep to be loud too, so I spent a lot of time researching and people say it makes a difference, people say it does nothing.
I had a 6x7 airaid filter cone and it made a different sound at higher rpms, and pulled just A LITTLE harder, but otherwise didn't do much but kill gas mileage. my Jeep is a 2000 XJ 4.0L
Took that same filter out of my jeep and stuck it in my friend's jeep who has the 4.0L in a 98 ZJ, thing sounded like a friggin mustang coming down the road, and he let me drive it and it accelerated like a mother compared to its acceleration with the stock airbox.
So now I'm finally getting to the point. Perhaps the reason for the varied responses on whether or not a bigger filter actually does anything, has to do with what year the jeep is, because I know somewhere along the way they've made changes to the 4.0L I6. Maybe someone has figured this out already but I haven't come across this reasoning yet and I've read so many posts.
Now my Saturn friend says that perhaps why the filter does really well on the '98 4.0 and not my '00 4.0 may be because the timing for the intake and exhaust is different between them? something like that? I'd like to understand so whoever is still reading by now thank you for any information you give!