I've got a question for the Tiburon experts out here. I bought a 1997 Tiburon with 1.8 liter engine new, so I know that what is on the car is what was put in by the factory. I recently purchased, through Ebay, an exhaust manifold from a 1997 Tiburon FX (2.0 liter engine). I made this purchase because the original manifold on my car, which is constructed of thin wall tubing, had developed a lot of cracks ( I understand this is not an uncommon problem) and I was seeking an economical replacement. On receiving my new (read used) manifold, I found that it was a heavy, cast manifold, unlike the thin-walled manifold in my car. Also, the vertical length was much shorter ( from engine flange to exhaust flange). Okay, now to the question(s). I had always believed that the 1.8 and 2.0 engines were basically the same with bore and stroke being the primary differences. I know the head on my car has a 1.8/2.0 designation cast into it. Are the blocks, in fact, different? Can I purchase a flex pipe from Hyundai that would properly connect the cast iron manifold to my stock exhaust system, or were there other differences in the FX exhaust system that would preclude this? Thanks in advance for any help you provide.