While I think the improvement with a trunk spoiler is subtle, I thought it was worth the effort and minimal cost. I got this one on Ebay for around $100 painted. It was a little tricky getting the installation correct because you are dealing with two surfaces that are at 90 degrees and the adhesive is very tacky. My first attempt was unsuccessful and I had to remove it with string cutting through the body tape, adding new body tape and the second try came out perfect.
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