Wasn't trying to be a d*ck, it's just the spoiler question is usually followed by, "How much horsepower will my NOS stickers get me?"

For a spoiler to do anything, you need:
1-rear wheel drive
2-110 mph+
3-wind tunnel for tuning angle of wing

Other than professional race teams ( many of which NEVER use spoilers ) none of us rally have the need or means to use a spoiler properly.

But if it's the look you're going for, why not if it's just for looks.

I'm just more about go, rather than show...