Picking up a set of is300 vertex side skirts is one of the most effective ways to change the entire profile of your Lexus without making it look like a complete spaceship. If you've spent any time in the IS300 community, you know that the "Vertex look" is basically the gold standard for anyone who wants that clean, low-slung drift aesthetic without going over the top. The first-gen IS300 has a naturally boxy but smooth design, and while the factory lines are great, they can feel a bit unfinished once you start dropping the car on coilovers.
The real magic of these side skirts is how they bridge the gap between the front and rear of the car. Without them, a lowered IS300 often looks "pinched" in the middle. You'll have a nice front lip and maybe a rear valance, but the sides stay high, creating this awkward visual void. Adding the Vertex style pieces fills that space perfectly, giving the car a much more planted and aggressive stance.
Why the Vertex Style Works So Well
There are a lot of body kits out there for the SXE10 chassis, ranging from the super aggressive BN Sports kits to the more subtle TRD options. But the is300 vertex side skirts occupy this perfect middle ground. They don't have massive vents, crazy fins, or weird cutouts that look dated after six months. Instead, they feature a smooth, linear design that follows the existing body lines of the doors and fenders.
When you look at a car equipped with these, it feels cohesive. It looks like something that could have come from a special "performance" trim at the factory, albeit a much lower and cooler one. This "simple and clean" philosophy is what made Vertex legendary in the Japanese tuning scene. It's about enhancing what's already there rather than trying to hide the car under a mountain of fiberglass.
The Drift Heritage
It's hard to talk about these side skirts without mentioning drift culture. Back in the early 2000s, Vertex was the go-to for guys who wanted their cars to look like "street specials." They wanted cars that could tear up a mountain pass or a circuit but still look classy enough to park at a nice restaurant. That heritage is baked into the design. When you see those side skirts, you immediately think of golden-era JDM builds. It gives the IS300 a bit of "soul" that's often missing with more modern, generic body parts.
Materials Matter: FRP vs. Polyurethane
One of the big debates you'll run into when shopping for is300 vertex side skirts is what they're actually made of. If you're buying authentic Vertex from Japan, you're getting high-quality Fiber Reinforced Plastic (FRP). If you're looking at replicas—which, let's be honest, many people do—you might have the choice between FRP and Polyurethane.
FRP is the traditional choice. It's stiff, it holds its shape perfectly, and it's relatively easy to repair if you crack it. Because it doesn't flex much, the paint usually stays looking better over time without spider-webbing. On the downside, if you hit a speed bump too hard, FRP is going to crack. It doesn't "give."
Polyurethane, on the other hand, is much more forgiving. If you're planning on driving your car "static" (meaning really low on coilovers) and you know you're going to be scraping on every driveway, poly might save your sanity. It can flex and bounce back from minor impacts. However, poly is a bit of a nightmare to prep and paint, and sometimes the fitment isn't as crisp as a well-made FRP piece. It can also sag over time if it gets too hot.
The Reality of Installation
I'll be the first to tell you: rarely do aftermarket body parts just "bolt on" like a set of Lego bricks. Even with a decent set of is300 vertex side skirts, you're going to need a bit of patience and maybe a few extra hands.
Most of these skirts are designed to fit over the existing rocker panels. You'll usually use a combination of self-tapping screws in the wheel wells and high-quality 3M double-sided tape along the top edge. Some people prefer to use rivets for a more permanent, "track-ready" feel, but that requires drilling into your metal rockers, which can be a scary prospect if you're worried about rust later on.
Prep and Paint
If you want the car to look good, don't just spray-can these in your driveway and call it a day. The IS300 has some beautiful factory paint codes—like 006 Pearl White or 1C0 Millenium Silver—and if the match is off, it sticks out like a sore thumb.
Because the side skirts sit so low to the ground, they're going to take a beating from rocks, sand, and road debris. It's worth spending the extra money on a good primer and a high-quality clear coat. Some guys even wrap the bottom edge in paint protection film (PPF) just to keep the "road rash" at bay. It's a small detail, but it keeps the car looking fresh for way longer.
Completing the Visual Flow
While we're focusing on the is300 vertex side skirts, you have to think about the rest of the car. If you put these on a completely stock IS300, it might look a little lopsided. Usually, these skirts look best when paired with a matching front lip. The Vertex front lip is the obvious choice, but they also play surprisingly well with the GReddy/TRUST style lips or even the OEM "L-Tuned" front ends.
The goal is to create a level line from the front of the car to the back. When you look at the car from the side, you want that bottom edge to stay at roughly the same height. If the front is higher than the sides, the car looks like it's squatting; if the sides are lower than the front, it looks like it's nose-diving. Getting that "level" look is the key to a professional-looking build.
Wheels and Fitment
You also can't ignore the wheels. Since these side skirts make the car look wider and lower, your stock 17-inch wheels might start to look a little "sunken" into the wheel wells. A lot of owners find that once they install the skirts, they suddenly feel the need for spacers or a new set of wheels with a more aggressive offset. A nice set of 18-inch wheels with a bit of dish or a concave face really fills out the space that the Vertex skirts create.
Living with a Lowered Car
Let's talk about the practical side for a second. Once you've got those is300 vertex side skirts installed, your life changes a little bit. You start looking at speed bumps like they're mountains. You start taking angled approaches to every driveway.
It's a bit of a trade-off. You're trading a bit of convenience for a whole lot of style. But honestly, every time you walk back to your car in a parking lot and see that silhouette, you'll realize it was worth it. The way the light hits the curve of the skirt and makes the car look like it's hugging the pavement is just unmatched.
Final Thoughts on the Vertex Look
At the end of the day, choosing is300 vertex side skirts is about respecting the original design of the car while giving it that extra "edge" it needs. Whether you're building a dedicated drift car, a show-stopper, or just a cool daily driver, these pieces are a classic choice for a reason. They don't try too hard, and they don't go out of style.
If you're on the fence, just go for it. Just make sure you take your time with the fitment and get the paint right. The IS300 is becoming a modern classic, and treating it to some quality aero is one of the best ways to keep it looking relevant and sharp on the road. It's one of those mods where, once it's done, you'll wonder why you didn't do it years ago.