Under Chassis Air Intakes - installed
Le Mans Master
Joined: Jul 2000
Posts: 6,559
Likes: 4,501
From: North Dallas 40 TX
Wow! That is certainly good looking and probably very effective.
However, I wonder if the factory piece was somewhat open for a reason. Like reducing the amount of stones and water up into the engine bay. Now if you are only using the scoops on the track, that should not be a problem.
The factory ones were designed for street use. And the lower rear brake ducts, which are closed are intended for track use only.
However, I wonder if the factory piece was somewhat open for a reason. Like reducing the amount of stones and water up into the engine bay. Now if you are only using the scoops on the track, that should not be a problem.
The factory ones were designed for street use. And the lower rear brake ducts, which are closed are intended for track use only.
Burning Brakes
Joined: May 2023
Posts: 1,033
Likes: 370
From: Ontario
Wow! That is certainly good looking and probably very effective.
However, I wonder if the factory piece was somewhat open for a reason. Like reducing the amount of stones and water up into the engine bay. Now if you are only using the scoops on the track, that should not be a problem.
The factory ones were designed for street use. And the lower rear brake ducts, which are closed are intended for track use only.
However, I wonder if the factory piece was somewhat open for a reason. Like reducing the amount of stones and water up into the engine bay. Now if you are only using the scoops on the track, that should not be a problem.
The factory ones were designed for street use. And the lower rear brake ducts, which are closed are intended for track use only.
Possibly more crucial than a cooler engine bay?
I can't tell from the angles that the pics are taken. Straight on pic front to back would tell the tale.
They sort of look a bit further inboard than the brake scoops in post #1.
Melting Slicks
Joined: Jun 2001
Posts: 2,266
Likes: 549
JWT603, no on the factory part. The factory part numbers are out there, unfortunately the search feature on the forum is not working right. I had the factory numbers and had a GM search done for me. If any could have found it, it would have been this person. Somewhere in the forum is the post from Germany (I believe) showing a damaged part and asking where to find it. That is what started this subject. And after 3 days of R&D the first prototype was built using my car as a Template. Which led to this post by the OP. I hope this helped answer your question.
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Melting Slicks
Joined: Jun 2001
Posts: 2,266
Likes: 549
With the forum search problems I went page to page to find this. FS (For Sale) DIY Germany car only air ducts - CorvetteForum - Chevrolet Corvette Forum Discussion
Advanced
Joined: Sep 2021
Posts: 81
Likes: 22
From: USA
With the forum search problems I went page to page to find this. FS (For Sale) DIY Germany car only air ducts - CorvetteForum - Chevrolet Corvette Forum Discussion
Last edited by RafGTS; Feb 10, 2024 at 02:57 PM.
Racer
Joined: Apr 2024
Posts: 353
Likes: 180
From: Michigan
With the forum search problems I went page to page to find this. FS (For Sale) DIY Germany car only air ducts - CorvetteForum - Chevrolet Corvette Forum Discussion
Melting Slicks
Joined: Jun 2001
Posts: 2,266
Likes: 549
@itsonlyairandfuel The FS link seems to be dead. I ran across this thread after finding some of the other related posts via a search. Are you still making these or are any available?
Advanced
Joined: Oct 2008
Posts: 80
Likes: 8
From: Toms River NJ
I also found these for anyone interested...They are used in their turbo kits.
https://specialtyvehicleperformance....eflector-ducts
https://specialtyvehicleperformance....eflector-ducts
Melting Slicks
Joined: Oct 2008
Posts: 2,069
Likes: 1,157
From: Pasadena Texas
Gm part a1 85580653/001 rh
gm part a1 85580653/001 lh
The part number provided,
GM PART A1 85580653, corresponds to a genuine GM underbody rear air deflector. The "RH" indicates it is the Right-Hand (passenger) side part. Here is a summary of the item:
I got mine through World Parts Direct for around $250 for the pair. Don't ask why one was $2 more expensive than the other.
gm part a1 85580653/001 lh
The part number provided,
GM PART A1 85580653, corresponds to a genuine GM underbody rear air deflector. The "RH" indicates it is the Right-Hand (passenger) side part. Here is a summary of the item:
- Part Name: Underbody Rear Air Deflector (also referred to as an "F Deflector").
- Manufacturer: General Motors (GM Genuine Parts).
- Part Number: 85580653.
- Side: Right-Hand (RH), which is the passenger side of the vehicle.
- Function: This part is designed to help protect the underside of the vehicle, particularly the engine area, from damage caused by road debris and to manage airflow beneath the vehicle.
- Replaced Part Number: It replaces the older part number 85157543.
- Availability: The part is available for purchase from various authorized GM parts retailers online, such as GM Parts Center or GM Parts Direct
I got mine through World Parts Direct for around $250 for the pair. Don't ask why one was $2 more expensive than the other.
Last edited by OLD_GOAT; Nov 26, 2025 at 08:21 AM.
