I got the magnaflow cat back system today and im pretty happy with it so far. Its 1 in and 2 out the back with tips

 

I forgot to add this to my original post. Will hollowing out my cats be a bad thing?

 

probably worth more if you just remove them, sell them to the metal recyclers.

presuming that you have a 4 cat system, its my understanding that no harm will come from removing the rear 2 cats. Provided that all the 02 sensors are still in place.

 

It would be nice if you'd provide details......year+model+engine.......

 

It would also be nice since you installed a new toy, to provide appropriate pics!

 

Haha ok it's a 2007 f 150 king ranch 4x4 crew cab and I only have 2 cats on this system. And I couldn't figure out how to add photos I tried last night I clicked on insert image and it asked for a URL address so do I have to upload it from photobucket or what?

 

With the 5.4L engine