I didn't know there were two models, I looked it up and I have the 2 chambered one. Though I can hold it up and perfectly see out of the other side? I might as well have a damn Flowmaster..

 

on the center to center you can b/c I have those for max power and flow.

 

mine was a straight through design. i could look right through it.

 

Do you know the part number of yours? Mine is 21506, 3" center/center.

 

Here's what I'm talking about. I've never looked through the first one so I can't say if thats a straigh through style either but it looks chambered.

 

right from summits website, this is the one i got:

hooker aerochamber

 

We have the same one except mine is 3" in/out.

Zick, I have the first one but it's center/center. All I know is I can look through one end and see through the other, I guess it'll have to do..

 

I've got the 1st style one. I just got it welded on w/ a turn down. It's quiet but sounds good and best of all, no popping $hit like Flowmasters. I hope it gets a little louder as I break it in. All I need now is some long tubes and O/R y pipe.

 

I'll really debating getting a Aerochamber or the Magnaflow dual in/out with built in X-pipe.
I'm going to be putting on my TOGs and cutting the CATs pretty soon and I'm not sure which one will sound the best. I'm afraid the Aero is going to get poppy without CATs and thats why I'm thinking the Magnaflow with X-pipe will take care of that but it cost almost twice the $$$.

 

That magnaflow is fairly quiet, I have one sitting in my garage that I took off my truck. I put the aerochambers on it and never looked back.