Recently, I wrote a review of the Swift Sport in its completely stock condition. Since then, I customized it by installing SWK’s lowering sport spring set, so this time I’d like to share my review and impressions.

SWK Lowering Sport Spring Set (ZC33S)

The springs I installed this time are sold by SWK (Suzuki Works Kurume), a dealer operating Suzuki Arena Kurume West.

When deciding on lowering, I focused on the following points:

• Since my wife and kids mainly drive it, I didn’t want it to be too stiff.
• I wanted to keep the stock Monroe shocks as they are.
• Maintain ride comfort while prioritizing stability during cornering.

With that in mind, I was looking for a product designed to work well with stock shocks rather than coilovers, and I was told SWK’s springs were a great choice, so I decided to buy them.

The set includes springs, bump rubbers, and camber bolts—all three for 32,500 yen (tax excluded), which is quite affordable. I ordered online and they arrived in about two days.

Evaluation and Impressions After Installing SWK Lowering Sport Springs

First, the look changed significantly. By actual measurement, it seems to have dropped about 2.5 cm, but the whole car sits lower, giving a strong impression of being poised and ready. Sitting in the driver’s seat also feels noticeably lower, shifting the vibe from a family car to more of a sporty feel.

Once driving, the ride comfort is not bad at all. On flat roads, it actually feels improved, with a greater sense of flatness and stability.

On small bumps or slightly rough surfaces, the ride comfort is almost the same as stock.

The only difference is that sometimes you get a sharp jolt when going over large bumps. Although I replaced the bump rubbers with dedicated ones, which should reduce suspension bottoming out significantly, there are still occasional impacts on big bumps. If you keep the stock bump rubbers, it might get quite harsh.

So, if you’re considering this upgrade, I recommend changing the bump rubbers at the same time.

Right after replacement, there was barely a three-finger gap. Now it has settled to about two and a half fingers.

The stock ride height had this much gap between the fender and tire.

The biggest difference is the stability during cornering. The tall, top-heavy feeling of stock is gone, and you can confidently take corners at a decent speed. It turns in sharply and aggressively, making it a lot of fun.

The spring rates are 2.3 kgf/mm front and 2.7 kgf/mm rear, which aren’t particularly high, but lowering the ride height has significantly lowered the car’s center of gravity. Because of this, the roll doesn’t suddenly increase mid-corner; instead, it stays consistent, allowing the driver to feel very secure when cornering.

Highway stability also seems improved. The stock suspension was already stable at highway speeds, but now there’s an even stronger sense of grip. The ride comfort at high speeds is also fine—comfortable enough that the family won’t complain.

So far, my wife really likes it, saying the increased stability makes driving more enjoyable. I also occasionally drive the Swift Sport, and it’s definitely fun.

It’s light, so it accelerates briskly from any speed, and the sharp handling lets you zip through city streets. The shift feel and clutch operation are excellent, making it a car you want to drive endlessly.

Personally, I’m very satisfied with this customization, but if I were to dream a little more, I’d add a reinforced front stabilizer to increase roll stiffness and swap the seats to lower the seating position further. However, I don’t want to go too far and make it uncomfortable for the family, so I’ll keep it moderate for now.