This was my understanding as well and my 87 couple has them also.
If it costs $10-12 for rear curtain clips at Mid America/Ecklers, then $25-30 for deflectors is very reasonable. 
side-view mirror wind deflectors
Burning Brakes
Joined: May 2004
Posts: 1,182
Likes: 14
From: POINT PLEASANT NEW JERSEY
Got'em on my Black 87. Makes the Vette look wider as the mirrors flow into the body with the side deflectors on. I have always had them on...I heard they cut down wind noise. On a design standpoint I can see how . Mine are plastic and well worth the money...cheap Like $29 at Ecklers etc.
Le Mans Master
Joined: May 2005
Posts: 7,362
Likes: 2,281
From: Central Maryland
It can't be seen unless the door is open. And it's so minor that it's just of no consequence. I had the car for quite some time before I even noticed it, and for a bit longer before it occurred to me how that nick got there. Yawn...
Thanks again for the pizza, Bill!
Be well,
SJW
Thanks again for the pizza, Bill!
Be well,
SJW
Instructor
Joined: Nov 2006
Posts: 195
Likes: 0
From: Stamping Ground Kentucky
Team Owner
Joined: Jun 2001
Posts: 26,196
Likes: 0
From: Orlando FL
St. Jude Donor '08-'09
I added the plastic ones to my 89 coupe. I like the more molded-into-the-car look it gives them and it REALLY helps cut down on noise too. Since my AC doesn't blow cold air, the windows are down 24/7 when im driving.
Le Mans Master
Joined: Dec 2004
Posts: 7,475
Likes: 2
From: Austin TX
St. Jude Donor '07
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
Likes: 71
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
I have some metal ones to put on now and will be selling my fiberglass ones when I do. I really like them because they significantly cut down on the wind in the face when the window is partially or completely down. All C4s should have come with them. I really miss vent windows.
Melting Slicks
Joined: Jan 2002
Posts: 2,531
Likes: 35
From: Lecanto Florida
I have them on my 87. They're metal and held on with rivets. I thought about taking them off for a cleaner look but then thought I'd probably mess something up, scratch or break something trying to take the rivets out, so I just left them on.
Le Mans Master
Joined: Dec 2004
Posts: 7,475
Likes: 2
From: Austin TX
St. Jude Donor '07
Really. I have some metal ones to put on now and will be selling my fiberglass ones when I do. I really like them because they significantly cut down on the wind in the face when the window is partially or completely down. All C4s should have come with them. I really miss vent windows.
I have some metal ones to put on now and will be selling my fiberglass ones when I do. I really like them because they significantly cut down on the wind in the face when the window is partially or completely down. All C4s should have come with them. I really miss vent windows.
