C5 Rear diffuser making progress
Acct Suspended APR 2026 by request
Joined: Dec 2010
Posts: 10,367
Likes: 1,272
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
the one from breathless looks like it should be on a fart can ricer, to say it's ugly is an understatement
Thread Starter
Drifting
Joined: Mar 2012
Posts: 1,517
Likes: 147
From: Jasper Alabama
That Breathless has been out for a while and I think most agree its fugly and sticks out like a sore thumb. So hoping the OP of this thread doesn't go too far with adding extentions or may end up looking like the breathless one. Keeping it smooth with the lines of the C5 is the way to go.
Le Mans Master
Joined: Dec 2005
Posts: 8,475
Likes: 332
From: Port Arthur, Texas 77642
found a shop here in florida that supposedly makes one
This is a 100% functional lower rear diffuser. A must for track days or that ultimate racing look. Bolts on in about 1 hour.
Weight is under 10lbs.
It is a easy bolt on. Trim of the lower factory bumper and our rear diffuser bolts in from the back side and has a brace and bracket that attaches to the lower control arm bolt.
Our Diffuser was designed around the B&B 2 tip Exhaust system but other 2 tip systems could work as well.
This is a 100% functional lower rear diffuser. A must for track days or that ultimate racing look. Bolts on in about 1 hour.
Weight is under 10lbs.
It is a easy bolt on. Trim of the lower factory bumper and our rear diffuser bolts in from the back side and has a brace and bracket that attaches to the lower control arm bolt.
Our Diffuser was designed around the B&B 2 tip Exhaust system but other 2 tip systems could work as well.
http://www.breathlessracing.com/inde...&productId=911
Pro
Joined: May 2002
Posts: 523
Likes: 8
From: Nashville TN
Drifting
Joined: Oct 2008
Posts: 1,594
Likes: 189
From: Wilmington DE
for what you have done so far.
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Thread Starter
Drifting
Joined: Mar 2012
Posts: 1,517
Likes: 147
From: Jasper Alabama
Well I decided to shorten the extentions I added by 1". This made quite a difference if you could see in person. It brings them in perspective where they should be plus it adds a little more curve to follow the curve of the rear fascia. Here is a before and after pic of the fin. I will post more pics of the changes on the car tomorrow and take in the feed back from you all.
After trimming 1"
After trimming 1"
Last edited by Stealth02; Apr 26, 2015 at 10:10 PM.
Instructor
Joined: May 2013
Posts: 104
Likes: 0
From: Tucson Arizona
Looking forward to seeing your new pics tomorrow. But I was already a fan of your "after" design, but with a more rounded versus the current angular look as someone else already said. The angular lines don't flow well with the natural curves of the c5 body in my opinion. And the longer fins looked more balanced to me. But you can't please everyone. In the end, I think you should do what makes you happy with your design.
But ... if you want real market feedback, you'll need more input than the handful of folks commenting on this thread. I wonder if there's a way to do a survey thread with voting buttons in an appropriate section on the Forum. No discussion - just vote. And nothing to start the thread but pics of two versions. If you could do that you'd get some great market data in addition to more exposure to your cool ideas with potential customers.
But ... if you want real market feedback, you'll need more input than the handful of folks commenting on this thread. I wonder if there's a way to do a survey thread with voting buttons in an appropriate section on the Forum. No discussion - just vote. And nothing to start the thread but pics of two versions. If you could do that you'd get some great market data in addition to more exposure to your cool ideas with potential customers.
Thread Starter
Drifting
Joined: Mar 2012
Posts: 1,517
Likes: 147
From: Jasper Alabama
Looking forward to seeing your new pics tomorrow. But I was already a fan of your "after" design, but with a more rounded versus the current angular look as someone else already said. The angular lines don't flow well with the natural curves of the c5 body in my opinion. And the longer fins looked more balanced to me. But you can't please everyone. In the end, I think you should do what makes you happy with your design.
But ... if you want real market feedback, you'll need more input than the handful of folks commenting on this thread. I wonder if there's a way to do a survey thread with voting buttons in an appropriate section on the Forum. No discussion - just vote. And nothing to start the thread but pics of two versions. If you could do that you'd get some great market data in addition to more exposure to your cool ideas with potential customers.
But ... if you want real market feedback, you'll need more input than the handful of folks commenting on this thread. I wonder if there's a way to do a survey thread with voting buttons in an appropriate section on the Forum. No discussion - just vote. And nothing to start the thread but pics of two versions. If you could do that you'd get some great market data in addition to more exposure to your cool ideas with potential customers.
Burning Brakes
Joined: Oct 2008
Posts: 800
Likes: 12
From: Wichita Kansas
Looking forward to seeing your new pics tomorrow. But I was already a fan of your "after" design, but with a more rounded versus the current angular look as someone else already said. The angular lines don't flow well with the natural curves of the c5 body in my opinion. And the longer fins looked more balanced to me. But you can't please everyone. In the end, I think you should do what makes you happy with your design.
I like the rounded edges with the extended centers for a more argessive look.
Thread Starter
Drifting
Joined: Mar 2012
Posts: 1,517
Likes: 147
From: Jasper Alabama
I think I nailed it. Shortened the extensions to the inner fins. Rounded out the outer fins. Really conforms to the shape of the rear now. Shoot me your feed. Need to get this thing wrapped up. Having surgery tomorrow so I'll be down for a few weeks. I really like the look of it now.
Last edited by Stealth02; Apr 27, 2015 at 02:50 PM.
Racer
Joined: Mar 2012
Posts: 269
Likes: 385
From: SWFL
2026 Corvette of the Year Finalist - Modified
2025 C5 of the Year Winner - Modified
2024 C5 of the Year Finalist - Modified
Big fan of the revised look. Takes the best from both previous versions and combines them into one. Sign me up!
Melting Slicks
Joined: Nov 2003
Posts: 2,192
Likes: 120
From: Bennett CO
2015 C5 of the Year Finalist
St. Jude Donor '05-'10
