We recommend replacing the bracket when installing aftermarket parts.

1. I installed an aftermarket later-model rear skirt. The bottom of the later-model rear under is slightly lower than the earlier model, and there is a difference in the stays that support the skirt body. The stay that secures the center of the center stay of the early model does not reach the bottom of the later-model skirt. It is possible to force it into place by using a long bolt, but the angle is slightly different, so I replaced it with the later model. The later model was created by welding a U-shaped bracket onto the early model part.
2. The brackets that secure both sides of the rear skirt are also different for the early and late models. The silver one on top is for the late model, and the black one on the bottom is for the early model that was originally attached. The late model has an additional bar that extends downward that is not included in the early model. There is no big problem if you don't replace it, but I replaced it for added reassurance.
3. The rear fender stay has been replaced with the later model. Unlike the earlier model, the rear skirt is firmly secured, reducing wobbling.

×

Comparison of early and late model stays

×

Comparison of early and late model stays

×

After installing the rear fender stay for the later model

Skirt and diffuser are also genuine parts.

1. I happened to already have the diffuser alone, so I later purchased the rear skirt for the coupe to match it. If you are buying a new one, the one-piece "71511-SL0-Z10ZZ" is cheaper and does not require any processing, so I don't think there is any point in buying them separately. * If purchased separately:
   92,700 yen (71511-SL0-000ZZ) + 98,000 (71515-SL0-Z10ZZ) + 1,575 (90149-SA0-003 x 9) = Total price: 192,275 yen
2. Some books say that this diffuser is made of dry carbon, but it is actually made of ABS resin and relatively heavy.
3. The back side is stamped with "ABS".

×

SKIRT COMP., REAR BUMPER 71511-SL0-000ZZ

×

Diffuser, rear skirt 71515-SL0-Z10ZZ

×

Engraving on the back of the 02R diffuser

1. The skirt alone has the same part number for all models in the parts search, but the skirt purchased separately (71511-SL0-000ZZ) does not have a hole for mounting the diffuser, so you need to drill a hole. In order to drill the hole in the exact position, I traced the diffuser's outline onto a clear file sheet. I used the product "Hikari PP Board Transparent P466-1 460 x 650 x 0.2mm" (181 yen including shipping on Amazon).
2. Trace the hole positions of the diffuser on a sheet of clear file material and place it on the skirt. It will be easier to determine the overlapping position if you trace the outline of the diffuser itself and use the positions of the two cutouts on the front of the vehicle as a reference.
3. After drilling the holes. Because it is ABS resin, the cut surface is prone to fraying. It will not be visible after the diffuser is installed, but I smoothed it out with paper just to be safe.

×

Pattern made from clear file material (PP)

×

Attach the pattern to the skirt

×

Holes in the skirt completed

1. The diffuser was temporarily fixed with suitable bolts. It was carefully positioned, and it fit perfectly with the shape of the skirt. The surface of the new diffuser and skirt is not solid resin, but has a beautiful texture and is painted with a matte black finish. I tried to identify the official color of the painted parts of the diffuser and skirt, but I couldn't find out. However, when I actually saw the new genuine product, I thought that the color I saw when I bought it was the genuine color I saw in catalogs and books, so I decided to leave it as it was.
2. Looking at the genuine bolts I purchased at the same time, I noticed they had a stepped structure and the overall length to the integrated washer was quite long. The mounting holes on the diffuser side were not that deep, so I felt like I could tighten them all the way.
3. When I tried installing the original bolts, I found that I couldn’t tighten them enough for the washer to sit flush with the skirt. The stepped part didn’t make proper contact either.

×

Temporarily attach the diffuser to the skirt

×

Genuine mounting bolt 90149-SA0-003

×

The genuine bolts are tightened until they bottom out.

1. Even when I attached the bolt to the diffuser and tightened it until it bottomed out, it still stopped with a lot of the thread remaining. ...I thought I might be able to tighten it further by forcing it, but I gave up, since I didn't want to penetrate the sealed internal structure of the diffuser. After doing some research myself, I found many photos of genuine diffusers that have drainage holes on the bottom (road surface side). My diffuser doesn’t have any drainage holes. Perhaps the ones that do have such holes are designed for bolts to pass through, but I haven’t been able to confirm this.

×

Diffuser alone, tightened until it bottoms out

×

Misumi Urethane Washer URWS20-10-5

1. Since I had the chance, I decided to use the genuine bolts I had purchased and solve the problem by inserting washers into the gaps. When I looked at the bolt seating surface on the rear underside, I found that there were curved areas, so I decided to insert a 5mm thick urethane washer.
   I used Misumi's urethane washer (free-spec type):
   URWS20-10-5open_in_new The hardness selected is the hardest, Shore A95.
2. The gap that occurred when it hit the bottom was about 4 mm, so I reduced it by 1 mm and it feels just right.
3. Installation complete. Now, all the exterior parts are genuine except for the hood and rear spoiler. If the inner fender is left as it is for the early model, there will be a small gap, so the inner fender is also replaced with the later model.
   For details on the inner fender replacement, see the report on the 02R inner fenderopen_in_new. Since the rear spoiler is made of wet carbon, I’d eventually like to replace it with a dry carbon one, even though using the original may not be possible.

×

Attach the genuine bolts by sandwiching the urethane washers

×

Skirt + diffuser installation for 02R completed

×

Turnbuckle type stay rod

1. There was no problem when it was made of FRP, but after replacing it with the genuine part and installing a diffuser, the weight increased, and it became quite wobbly without a rain hose. I didn't want to install a rain hose, so I was thinking about whether I could support it with some kind of stay, and then I found a perfect hole in the body just above the support hole in the skirt. It seemed like I could extend the stay from this hole and secure it in place. The rod I purchased is an adjustable rod sold on Yahoo! Auctions and other sites under the names "stay rod" or "connection rod." The product has a total length of 175mm to 220mm, with a turnbuckle part (the black pipe part) of 150mm, and all the screws are M5.

1. Installation complete. The wobble that was there before installation is completely gone. The stay rod I used has an aluminum pipe covering the turnbuckle in the center, but this aluminum pipe and turnbuckle spin freely, making it very difficult to adjust the length and tighten the fixing nut (it is impossible to adjust the length while rotating the center).
   It still looks fine without the aluminum pipe, and can be securely fixed, so I used it with the aluminum pipe removed.

×

Skirt reinforced with stay rods