Me and my friend installed everything our selves. Pedals were a pain in the ***. Gas cap was easy, just need two people and the right tools. All the instructions are just diagrams an use metric drill bit & sockets. I purchased a drill and socket set (black & decker/Stanely) on Amazon with metric sizes before I did the install. Fiat gave me the cat to match my car as well...jk!
The car did not come with the side molding. I had the factory add them on before I took delivery along with the inserts on the moldings. The gas cap is easy to install if you have someone helping you. jack up car, remove wheel, unbolt factory gas cap, remove wheel well liner from left to right (only removes half way, don't try and pull the whole thing off). Stick your hand up behind the gas cap and remove 2 bolts that hold the fuel door in (hinge). Pull out oem fuel door. Insert new door and bolt from the front and back. Reattach wheel well, wheel. Took 1 hr. Just make sure you have metric socket set, you need 7mm, 8mm, 10mm. One more tip. Stick an old rag in the gas tank so no bolts accidentally slip into your tank. good luck
the factory gas pedal does have a slight angle to it if you look closely. When you overlay the aluminum pedal it accentuates it a bit more since it is raised and shiny. They were a pain in the *** to put on...recommend having the dealer do it.