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Presenting the all new, ACS-C7 Corvette diffuser DUAL fin per tunnel system
The Corvette Stingray is, of course a phenomenon. The Corvette name and design is synonymous with top-notch Americana and in the Stingray, they created the model that easily offers the greatest style, performance and optimal comfort per dollars spent. At ACS, however, we never rest easy, even when we’ve already improved on near perfection with our previous diffuser fin system. A result of listening to owners and relentless investigation, our new dual fin setup works some seriously alchemical magic on the Stingray’s or Z06 rear end design.
The fact that each diffuser panel is now adorned with not one but two fins really does, we’re confident you’ll agree, add some seriously kick *** attitude to the vehicle’s derriere! Of course, being ACS parts, these visually stimulating additions will do more for your Corvette than add ‘va va voom’. Our diffuser fins will help to:
Stimulate airflow in the integrated diffuser by redirecting the rear airflow in a linear direction, helping to improve airflow in the undercarriage
Boost the vehicle’s aerodynamics as a result of a reduction in turbulent air at the rear end. The diffusers act to direct fast-moving air away from the undercarriage as it decelerates and expands
‘High performance design’ (clearly the Corvette is already this) is not synonymous with perfect design and each ACS addition is constructed with the intention of making subtle tweaks that drive your vehicle closer to the edge of fathomable design perfection.
The facts: ACS-C7 Stingray Corvette diffuser dual Fins
- Designed for all Stingray C7s, coupes, convertibles or Z06
- Complements existing OEM diffuser
- Manufactured in highest quality ABS composite material, same material as the diffuser already on your car.
- Available in Carbon Flash Black finish, to match your car’s diffuser or
- Unpainted to be custom detailed to match your car's color
- Simple installation (with supplied templates) using 3 SEM bolts each side
- 25 minute per side installation time
I just received my order of the dual fin per side package, and here's my experience with installation as well as a product review. Everything arrived well packaged, including the fins, plastic bag of mounting hardware, instructions and tape-on pattern for drilling holes in precise locations.
The instructions are short and easy to follow. I ordered mine unpainted to save $100 bucks, and if you go that route here's what you need to know. The fins are primed but they have manufacturing marks in the surfaces that you may want to sand out. I didn't bother with that because you just can't see that kind of detail on that area of the car unless you crawl underneath and inspect it at very close range. I also used gloss black paint because again, you just can't tell black from carbon flash unless you get down there close up, it all looks black.
Next, when you cut out the pattern, which will be taped to the valance to mark the holes for drilling, I recommend you use a magic marker to add notes that will make it easier to orient it. You'll notice that the original printing ends up inverted when the pattern is placed against the valance. I also found it useful to use the two screws at the bottom to hold it in place for taping, then remove them again after drilling the holes.
NOTE: You'll see in these pictures that I have the car up on jack stands all around with the wheels removed. I was doing track prep on my brakes, but all you will need to do is jack up the rear end, and if you remove the lower valance as I show in the next few pictures, you won't even need to do that.
I found it very helpful to also remove the three screws on the outside bottom of the valance (in addition to the two on each side the instructions call for) to make it easier to get your arm behind it to tighten the mounting screws. After installing the two driver's side fins I decided to do the passenger side by removing the entire lower valance beforehand, to make it easier to install the interior mounting hardware. This is NOT NECESSARY, I just wanted to see how much difference there would be. Without removing the valance, it is a very tight fit to work on the middle and upper attaching screws and washers. You'll need a 7mm ratcheting box wrench, and its tedious and relatively slow going. I've removed the lower valance before (NOT the entire rear end) so I already knew how easy that is, and working standing up with everything open and right in front of you really simplifies things. If you go this route, just be careful when detaching the crosshatched louvers at each side, they must be pushed out from the back side after removing all other attaching points, in order to avoid breaking them.
All four fins fit perfectly, tightening down snuggly and looking like they are part of the valance. Removing the valance, installing the fins and re-installing the valance takes all of 30 minutes. I'm very happy with the finished product and the look.
Okay, I'll give these a try, unpainted, since I'm handy with auto paint, to keep the price reasonable. I'm headed to your website to order now and I'll post a review here when I get them installed.
Awesome!!! I think a few of us from another thread will be ordering some - if another vendor isn't feeling well soon.
He needs to stop posting pictures of his shop and post photos of our orders being completed instead.
These will match my ACS Composite skirts nicely. I knew I should have waited...
Awesome!!! I think a few of us from another thread will be ordering some - if another vendor isn't feeling well soon.
He needs to stop posting pictures of his shop and post photos of our orders being completed instead.
These will match my ACS Composite skirts nicely. I knew I should have waited...
I just received shipping confirmation from the other vender...
Pretty nice, but I can't justify the price for what they are.
I agree. I want to get the rear quarter vents as well as these fins, but the price?????? I am Canada so I have another 30% exchange plus shipping, yikes!!
Can they be attached with adhesive instead of bolts to avoid drilling holes in the lower bumper?
Our instructions call for drilling some holes in the diffuser and bolting them on. Of course, if you wish, they can be installed using two way tape, I am not a fan of it, but yes, why not. There is a back surface to it.
As for the diffuser, it is fairly cheap from GM, and it comes painted in CFZ, so if you ever wanted to go back to diffuser-less, that would be a good option, and you'd sleep better knowing there is no risk of parts flying off your car at high speed.
Pretty nice, but I can't justify the price for what they are.
Of course, pricing, or product value is always questionable. Some may say expensive, others may consider them cheap. I guess getting the full story is needed.
Do consider these were Cad designed, and produced in plastic injection. Not Hand Crafted, or Hand Laminated. The reason i say this is too justify the R&D or start up cost involved with a parts of this caliber. Each process has its pros and cons.
The pros, are durability, perfect fit, and quality. The con's is the start up investment considering the aftermarket volume, and as you may know the aftermarket is not like Bowling Green volumes, but a niche, exclusive market.
The parts are made from a P20 Steel Tool ! This was the only way to get a perfect fitting part to meet the required criterias. Every part we produce will meet the same OEM standards, whether we are building parts directly for GM or the aftermarket, we strive to have the same quality standard. Something i am very proud of.
Here is a write up if you care to learn more about us.
ACS Double Fin Diffuser Conversion kit
