Hi everyone my name is Rob, I'm new to the forum so I'm not sure how this works. Here goes nothing.
I just traded in my 2009 Honda Fit Sport for a brand new 2019 Honda Fit EX and I was wondering if there is a way I can make it look like a Sport model with out buying the sport package from the dealer?

 

The only other option would be to DIY the sport details.

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With the exception of the sunroof, rear bumper, black wheels, muffler, black and copper stitched cloth interior (unique to the Sport)...

You can for sure get the Sport (or HFP if available) front lip since it shares the same front bumper cover as the other face lifted trims (will need bumper to be drilled to clip it on) and HFP side skirts to make the car look more like a Sport with the least amount of hassle money into it.

If you want the rear diffuser that the Sport has... You MIGHT be able to get it to work but trimming the rear bumper for the exhaust cut out and MAYBE have the locking tabs line up for the diffuser but that's a vague guess without seeing parts in front of me. Your car, your choice on that one so you can try it at your own risk then report the findings.