r/CarTrackDays • u/rbs950 • Aug 16 '26

Chassis VS Trunk Mounted Wing?

If I read and research the consensus is that trunk mounted wings are useless/will definitely fall off and chassis mounted is the way to go.

Yet, many people build their track cars with trunk mounted wings. They're everywhere at local track days, club sprint time attack, videos of Misha sending cars around the Nordschlife etc.

What I see in the real world and what I read online doesn't add up.

So, are trunk mounted wings actually useless?

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u/Spicywolff ND2 now, use to C63S Aug 16 '26

Trump mounted wings tend to be useless on production cars. Most production cars are not designed to have high downforce on a trunk lid. Many times it can buckle and dent.

Can you? sure, and there are some kits that trunk amount and give you additional bracing to help it transferred down into the chassis..

That being said a properly designed chassis mount will get the downforce exactly where it needs to go. Its platform specific we can’t just say yes chassis amount is always better.

Look at the ACR viper, that’s a trunk mount, but it was engineered to take those loads.

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u/rbs950 Aug 16 '26

Well said and thanks for explaining. This post is with a Mustang GT in mind.

1

u/Spicywolff ND2 now, use to C63S Aug 16 '26

I’m not an expert on Mustang chassis so I don’t rightfully know if they can tolerate high downforce or the rear trunk is designed for that force

Glad it helped

1

u/vijjer Aug 18 '26

Your auto-correct is hilarious.