Got an interesting problem here, lookin for a little help. I have a 2004 2.3 ZX3. Yay. Now I just today received my Magnaflow catback and put it together in the garage just to check it out because big momma is out of town for a few days with my car. The packing slip that came with the magnaflow said it was for a 2.3...the instructions that came with it say "2004 2.0 ZX3" Hmm... Could it be that the instructions are generic and they come with all the exhaust systems, weather it's for a 2.0 or a 2.3? Or did they screw up and send me a system for an older 2.0 engine? Is there any way to tell which one I have by looking at it? Anyone have pics of their system hung up or anything? Help help help.