Does anyone have any information about rear spoilers on C4 Corvettes? Mine has a spoiler on it, and I am trying to find out if this is a factory option, or an aftermarket add-on.

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I looked in the Corvette black book for that....none listed as options...only possiblity is ifit was a LIngenfelter...that had ground effects and a rear deck spoiler...maybe a greenwood...those were after market options...so my take on it is it is an aftermarket add-on unless it has greenwood or Lingenfelter badging.

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....Jeff

Thanks. I'll take take information and try to do some more research on my own. I posted a picture of this "Vette on here but I wasn't sure if it is on showing. Thanks again. It also seems to have some kind of ground effects package or body kit on it too that I haven't seen on other Corvettes. Thanks again.

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check to see if it says Greenwood or Lingenfelter anywhere.... that would tip you off...

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....Jeff

  To see this picture go to the posters profile........

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I have a similar spoiler on my 86, but not with the aggressive, over the side, drop down winglets.  My has a much shorter winglet on each end but is otherwise fairly similar.  I assumed it was a factory option, as the car has no other special body work (other than that from track trial and autocross use).

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There is no problem a little horsepower can't fix!

https://www.c4vetteregistry.com/member_uploads/14301_14400/14327/100_5963_zpse01892a52014510161358r.jpg

My 85 has a short spoiler on it that actually say's corvette on the winglets. I did some research and it was made by GM. in the accessory catalog in 96. hope this helps