Hey so I found this page where this guy had taken the upper air resonator and removed it and replaced it with a piece of 2.5" pvc pipe at 7.5" long, these are the right dimensions and all but I found a newer better trick for barely larger price.
First thing you’ll find yourself on is a hunt for 2.5" Outer Diameter PVC Tubing, its REALLY F*CKING HARD TO GET! So what I was doing was going around 3 different towns looking for it, turns out this guy FINALLY pointed me to a muffler shop saying “YOU know, most exhaust systems bumped up from 2” are 2.5" and they can actually flare the end, just like you’re talking." and then it hit me:
DRIVE TO THE MUFFLER SHOP!
So this lady ended up cutting a piece of 2.5" Muffler piping, sizing the end to I believe she said 2 7/8" (i just took the resonator in out of my hood and had her do it) so she charged me $10 for it all, I put it on, fits like a glove, sounds better and because the muffler tubing is actually made for air flow (hello, exhaust?) it’s made for it, more consistent, she was able to actually flare it to an extent where it was able to flow more air instead of the small flare of a PVC pipe, thus getting more consistent air flow and sounds a little bit better too
Here’s the pics!
Old upper resonator with the giant box on it (Pretty clear to see why you’d want it off?)
http://www.boombaprojects.com/images/upres.jpg
The new piece I got made at the muffler shop fitting like a glove…
http://www.boombaprojects.com/images/newupres.jpg
Both of the old resonators sitting and sobbing because they’ll miss the Zetec, but I’ll be glad to see them go…
http://www.boombaprojects.com/images/lwupres.jpg
And the lower resonator all by itself… sad…