If you're still in the air, I have a little feedback for you.
I ordered the lesser expensive of the two Magnaflow models available for 49-State.
By whatever strange coincidence, I've had two return the item TWICE. The part is being re-fulfilled by Amazon (once more), but if the 3rd time doesn't do it--I'm seriously considering either changing directions, or working with Magnaflow to find a suitable alternative.
The OBX header looks better since there's no pre-cats, but I dont like the idea of disturbing the normal behavior of the engine. Additionally, I'm cost-conscious, so having to setup an O2 delete or simulator seems like unnecessary cost, and risk to the vehicle's operation.
Finally, the Mangaflow (IMHO) sounds better than the OBX header --- but everyone wants to accomplish something slightly different.
Just my 2c.
EDIT: Worked through everything with Magnaflow, turns out nothing was wrong. The first shop was just pickier than the average place (or the tech didn't want to install it). Either way, I put the Magnaflow on.
I dont feel the added "pull" some have described by using it, but there's definitely better sound, which is all I could hope for right now.
I DID experience the CEL light a couple times after installing it. But, because I expected the O2 sensor codes, I simply cleared them after a hundred miles or so and they haven't come back.
Hope this helps!
Last edited by wjaspers; 08-22-2013 at 08:40 PM.