One of the most complained about things that I’ve seen with the new A90 Supra is the wind buffeting issue. If you’re unaware, when driving the Supra with the windows down and depending on the speed, wind will enter the cabin and will very noticeably buffet. This creates a very bad user experience and was a huge oversight on Toyota and BMW’s part.

Because this is such a prominent issue, a few different companies have introduced solutions that basically revolve around the same concept and that is to stick something on the side mirror plates to deflect the oncoming wind.

Today, we are specifically looking at AMS Performance’s MKV Supra Anti-Wind Buffeting Kit. The particular version that I went with has a gloss finish but this particular model is also available in matte carbon and a black ABS plastic version coming soon.

Installation for this product is as easy as can be. The kit comes with preinstalled with double-sided tape and this is used to stick the deflectors on to the mirror plates. That being said, there are some steps that we can take to prep the surface and help to promote better adhesion.

I’m going to start off by washing the area. For this task, I’m specifically using Chemical Guys Mr. Pink. This is a plain car shampoo with no additional additives. You don’t want to use something like a wash and wax because it leaves behind a thin layer of the additive and this can prevent the double-sided tape from adhering properly.

Next, I’m going to do chemical decontamination by using Adam’s Iron Remover. This product adheres to and dissolves iron particles that may have embedded themselves into the surface.

Next, I’m going to mechanically decontaminant the surface with a Meguiar’s Professional clay bar and Mirror Glaze Final Inspection. This process will pick up any remaining contaminants that may be on the surface.

Finally, I’m going to hit the surface with Chemical Guys Wipe Out. This is an isopropyl alcohol mixture that will strip the surface of any oils and residues. This will leave the surface completely bare and ready for the installation of the defectors.

Now, I know some of you may be watching this video and think that I really went the extra mile in preparing the surface. Some people may just stick the deflectors on and call it a day. You can very well do that but the main thing that I want to point out is that because the deflectors are something that we’re going to stick on and likely will not be taking off any time soon, anything that’s on the mirror plate surface will be trapped under the deflectors. They will be protected from any cleaning and depending on the contaminant, can spread and possibly cause damage. I would rather spend some time from the get-go and save myself possible future headaches.

Again, the deflectors come with two strips of double-sided tape preinstalled. I went ahead and added my own tape to create a solid barrier. Without this, there were noticeable gaps where contaminants could seep in and completely defeats the purpose of all the prep that I previously did.

If you think that I’m exaggerating, take a look at this picture of my rear spoiler during the pollen season. It’s completely caked all around the edges. Had I not properly sealed off the edges, all of that will be sitting between the tape, inside the spoiler.

So, for the wind deflectors, I tried to make one solid perimeter of tape. Contaminants will still be able to sit along the outer edges but so can water and that can potentially push the contaminants out rather than having a chunk of empty space in the middle where everything can collect.

Prior to sticking the deflectors onto the mirror plates, peel off a small section of tape’s backing. Crease the backing so that it hangs over the side. Doing this will allow us to position the deflectors without them fully sticking in place and still be able to remove the backing once everything is positioned. When you’re happy with the placement, slowly peel the rest of the backing off. Apply firm pressure to all the taped surface.

One side is complete. Repeat on the other and you’re good to go.

Overall, I would say that I like this product a lot. They do what they’re supposed to and don’t look half bad but I would like to note some quality control issues. This product was originally introduced in a matte finish and the added clear coat finish shown here only recently became available. The clear coat on my deflectors looks pretty good for the most part but there are some inconsistencies. This is mainly on the edges where sections don’t even have clear coat and there’s some apparent pitting. Again, this is on the edge where no one will see so I don’t really mind. However, after installation, I noticed that there were some white lines on the driver’s side deflector. I’m not saying that it is, but upon closer inspection, it looks like there’s a big white water spot about a one and a half inches wide. This spot is definitely under the clear coat and cannot be cleaned off. I have no idea how I missed this and it kind of sucks. It’s just one of those things that once you know it’s there, you’ll never unsee it. I’m currently in contact with AMS and the reseller. Hopefully, they’ll be able to help me out with this issue. Take my situation as a learning experience. If you’re buying these AMS deflectors, make sure to fully inspect them. If you’re worried about damages like I had, just skip the AMS altogether because there are other companies that produce the same thing.