C7 General Discussion General C7 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

Diffuser fins gap

Thread Tools
 
Search this Thread
 
Old Mar 14, 2024 | 10:17 AM
  #1  
Omarhassan's Avatar
Omarhassan
Thread Starter
Intermediate
All Eyes On Me
Liked
Loved
Top Answer: 1
 
Joined: May 2023
Posts: 49
Likes: 33
Default Diffuser fins gap

I recently installed EOS diffuser fins, one fin left a gap significant enough to bug me. Has anyone experienced this and come up with a solution. I have heard one person used black Caulking then painted it carbon flash. Has anyone experimented with any solutions.
Reply
Old Mar 14, 2024 | 11:31 AM
  #2  
miami08VETTE's Avatar
miami08VETTE
Melting Slicks
Supporting Gold
15 Year Member
Liked
Loved
Top Answer: 3
 
Joined: Dec 2007
Posts: 2,902
Likes: 668
From: North Fulton Georgia
Default

I have EOS fins. In my case they slowly developed a gap and have shifted position outward a bit. I will eventually re-adjust them and use a different attachment method. Only the lower section of the bumper needs to be removed. It will allow the lower piece to come away, making it easier to reposition with better fasteners. A few steps, but better than the original install method. My OCD will soon demand it!
Reply
Old Mar 14, 2024 | 11:37 AM
  #3  
miami08VETTE's Avatar
miami08VETTE
Melting Slicks
Supporting Gold
15 Year Member
Liked
Loved
Top Answer: 3
 
Joined: Dec 2007
Posts: 2,902
Likes: 668
From: North Fulton Georgia
Default

Originally Posted by Omarhassan
I recently installed EOS diffuser fins, one fin left a gap significant enough to bug me. Has anyone experienced this and come up with a solution. I have heard one person used black Caulking then painted it carbon flash. Has anyone experimented with any solutions.
By the way, not sure I would do this method. Just my thought...
Reply
Old Mar 14, 2024 | 11:57 AM
  #4  
Omarhassan's Avatar
Omarhassan
Thread Starter
Intermediate
All Eyes On Me
Liked
Loved
Top Answer: 1
 
Joined: May 2023
Posts: 49
Likes: 33
Default

Originally Posted by miami08VETTE
By the way, not sure I would do this method. Just my thought...
yeah i was getting exhaust installed so the rear section was removed anyways and that's when i installed them. Gap is annoying to me but no one else will ever notice or care, caulk seems extreme and may look bad.
Reply
Old Mar 14, 2024 | 09:09 PM
  #5  
Wickdc7's Avatar
Wickdc7
Advanced
All Eyes On Me
Liked
Loved
Community Favorite
 
Joined: May 2023
Posts: 67
Likes: 43
From: Melbourne, Fla
Default

I had the same issue, slight gaps annoyed me. Thought of a way to fix the gaps, but after months of putting it off, it doesn't bother me anymore. You can't see the gaps really from normal distance. l also installed the EOS stage 2 front splitter and the winglets aren't at perfect 90 degrees, but I knew after time I wouldn't care about it, was just happy to swap the poverty splitter with the better looking stage 2. Little things aren't worth the frustration, hammering the gas pedal and keeping the car out of a ditch is what I worry about, lol.

Top of fins have slight gap at top fit.

Slight tilt and edge gap
Reply
Old Mar 14, 2024 | 11:08 PM
  #6  
Jeffstern's Avatar
Jeffstern
Racer
Conversation Starter
All Eyes On Me
Photogenic
 
Joined: Apr 2019
Posts: 254
Likes: 41
From: Charlotte, NC
Default

I added additional zip screws and it tightened up nicely. No gaps
Reply
Old Mar 15, 2024 | 02:29 PM
  #7  
dbirdhouse1's Avatar
dbirdhouse1
Le Mans Master
20 Year Member
Liked
Top Answer: 1
Top Answer: 3
 
Joined: Jul 2004
Posts: 5,040
Likes: 939
From: Bonney Lake Washington
Default

yup, mine too just a fraction
Reply
Old Mar 15, 2024 | 10:13 PM
  #8  
SecondWind's Avatar
SecondWind
Instructor
 
Joined: May 2019
Posts: 243
Likes: 189
From: South East Wisconsin
Default

Did the hardware supplied actually fit the holes? I ordered the diffusers from EOS about 2 years ago and didn't install them because the screws just slipped into and out of the holes. Eos was responsive to my concern and sent another set of hardware that was exactly the same. I was unsuccessful finding any hardware that would work without altering the mounting holes so I returned them. (Sorry for the slightly off topic post)
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-3

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-4

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
Old Mar 15, 2024 | 10:36 PM
  #9  
dukecityevo's Avatar
dukecityevo
Advanced
Veteran: Air Force
10 Year Member
Liked
Community Favorite
 
Joined: Sep 2014
Posts: 88
Likes: 71
From: New Mexico
Default

I am not sure about EOS fins but I installed ACS fins. What I did was get longer screws and get some fender washers. The larger surface area of he fender washer allowed me to tight tighten the screws a bit tighter thereby removing the gap. Best of luck
Reply
Old Mar 16, 2024 | 04:19 PM
  #10  
miami08VETTE's Avatar
miami08VETTE
Melting Slicks
Supporting Gold
15 Year Member
Liked
Loved
Top Answer: 3
 
Joined: Dec 2007
Posts: 2,902
Likes: 668
From: North Fulton Georgia
Default

Originally Posted by dukecityevo
I am not sure about EOS fins but I installed ACS fins. What I did was get longer screws and get some fender washers. The larger surface area of he fender washer allowed me to tight tighten the screws a bit tighter thereby removing the gap. Best of luck
I'm probably going to this. I figured some larger washers would do it.
Reply
Old Mar 17, 2024 | 12:21 PM
  #11  
bills2017's Avatar
bills2017
Intermediate
 
Joined: Jun 2017
Posts: 44
Likes: 3
From: Maitland Florida
Default lower bumper with diffusers

I am looking to buy the lower bumper with the diffusers already built in. I would like to know if anyone has installed them. and what brand did they use and how the fit was. Much appreciate any help you can give me already installed the individual diffusers and do not like the look.
Reply
Old Mar 17, 2024 | 02:02 PM
  #12  
Jeffstern's Avatar
Jeffstern
Racer
Conversation Starter
All Eyes On Me
Photogenic
 
Joined: Apr 2019
Posts: 254
Likes: 41
From: Charlotte, NC
Default

Mine were ACS, and I had some gaps and had to add extra screws to tighten every up. I would imagine the EOS, are pretty much the same. I don’t see a big difference.

I removed the bumper cover and did on the kitchen table. Wife was not happy, but a lot easier than doing on the car. Came out pretty good and they are on there pretty solid. Also used a little trim tape between the screws.



Reply
Old Mar 17, 2024 | 04:43 PM
  #13  
Avanti's Avatar
Avanti
Race Director
25 Year Member
Community Builder
Loved
Community Favorite
 
Joined: Mar 2001
Posts: 19,947
Likes: 6,748
From: Bonneville Salt Flats
Default

There is another current thread in the General section here about another brand that developed gaps over time, as well.
Reply
Old Mar 17, 2024 | 05:22 PM
  #14  
miami08VETTE's Avatar
miami08VETTE
Melting Slicks
Supporting Gold
15 Year Member
Liked
Loved
Top Answer: 3
 
Joined: Dec 2007
Posts: 2,902
Likes: 668
From: North Fulton Georgia
Default

Originally Posted by Avanti
There is another current thread in the General section here about another brand that developed gaps over time, as well.
My EOS are developing gaps.
Reply
Old Mar 18, 2024 | 11:24 AM
  #15  
H Watkins's Avatar
H Watkins
Pro
Supporting Lifetime
20 Year Member
Active Streak: 30 Days
Liked
Loved
 
Joined: Jan 2004
Posts: 676
Likes: 196
From: Chester SC
St. Jude Donor '15-'16, '21,'24
Default

When I received my EOS diffuser fins, with the very first oneI pulled out of the box, the mounting plate fell off. The other three seemed secure.

It was obvious whick fins are right side vs. left. I thought I would temporarily mount thr right side with that clear, removeable double sided tape.
On th back of the fins, tow were labeled "left" and two, "R".

It was immediately obvious that EOS or their Shineese manufacturers, screwed up.


The "R" is upside down. I have to mount the right ones on the left and vise versa.

Last edited by H Watkins; Mar 25, 2024 at 02:05 PM.
Reply
Old Mar 20, 2024 | 07:37 AM
  #16  
BRomanelli's Avatar
BRomanelli
Racer
Conversation Starter
All Eyes On Me
Photogenic
Liked
 
Joined: Oct 2015
Posts: 402
Likes: 112
From: Matthews NC
Default Diffuser fitment gaps

After several years the caulk has held up great. No matter how hard I tried I could not get the fitment any better than I got it and they were ACS diffusers. The only way that I saw to eliminate the gap was with black caulk. I went to Home Depot , bought a tube of black caulk, after putting it on I wet my finger to smooth it out and then painted it carbon flash metallic. You really can’t tell I did it especially at that viewing angle..
If you do it make sure you buy paintable caulk…Good luck!
Reply
Old Mar 24, 2024 | 10:41 PM
  #17  
bills2017's Avatar
bills2017
Intermediate
 
Joined: Jun 2017
Posts: 44
Likes: 3
From: Maitland Florida
Default bad fit diffusers

I agree could not get mine to fit without spaces
Reply

Get notified of new replies

To Diffuser fins gap

Old Mar 27, 2024 | 01:55 PM
  #18  
emfollin's Avatar
emfollin
Racer
10 Year Member
Conversation Starter
All Eyes On Me
Top Answer: 1
 
Joined: Jul 2015
Posts: 492
Likes: 125
From: Maryland
Default

I just installed EOS fins and have very little gaps immediately after install. I bought fender washers as well. I also noticed the labels are backwards. I installed an L on the drivers side and it was crooked as hell. Installed the other L on passenger and it looked much better.
Reply
Old Mar 27, 2024 | 03:23 PM
  #19  
H Watkins's Avatar
H Watkins
Pro
Supporting Lifetime
20 Year Member
Active Streak: 30 Days
Liked
Loved
 
Joined: Jan 2004
Posts: 676
Likes: 196
From: Chester SC
St. Jude Donor '15-'16, '21,'24
Default

Originally Posted by emfollin
I just installed EOS fins and have very little gaps immediately after install. I bought fender washers as well. I also noticed the labels are backwards. I installed an L on the drivers side and it was crooked as hell. Installed the other L on passenger and it looked much better.
Do you recall the overall diameter of the washers that you used?
Thanks!
Reply
Old Mar 27, 2024 | 03:24 PM
  #20  
emfollin's Avatar
emfollin
Racer
10 Year Member
Conversation Starter
All Eyes On Me
Top Answer: 1
 
Joined: Jul 2015
Posts: 492
Likes: 125
From: Maryland
Default

1/4 inch by 1 inch
Reply



All times are GMT -4. The time now is 07:39 AM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE