FAQ’s

All XYZ coilovers have one year limited warranty. Any defective strut will be replaced with new one so you do not have to send it back to the manufacturer to be rebuilt to save your valuable time. This warranty is one of our products features (Rally Gravel coilover kit is not subject to this clause).

McPherson type: 45m/m, Double-Wishbone type: 30m/m.

Basically, the look of Rally Asphalt and Track Racing coilovers is identical. The length of spring on Track Racing kit is between 160m/m to 180m/m while that on Rally Asphalt kit is 180m/m to 205m/m. The compression damping on Rally Asphalt coilovers is softer but rebound damping is stiffer because asphalt road is not as flat as racing track; besides it has rough road condition like pits or holes so that’s why the damping setup is softer to prevent a vehicle from being too bouncy and being out of control. The compression damping on Track Racing coilovers is stiffer because there is neither hole nor pit on track; besides it requires fast speed for track racing so that’s why the damping setup is stiffer to prevent a vehicle from leaning over.

In general, the vehicle ride height can be dropped around 120mm from OE height for most applications, and the highest setting is same as OE vehicle ride height.

XYZ is monotube design which eliminates cavitation, has ability to dissipate heat, allows for larger internal working area, eliminate lag. In addition, this design enables coilovers to have a variety of responses to different road conditions.

The design of inverted tube is exactly opposite to the standard shock absorbers. The shock body is close to top mount, and strut cylinder is close to lower mount. Inverted tube is specifically designed for McPherson shock absorbers. The principle of inverted tube is to reduce unsprung weight (the total weight of the vehicle is not supported by the suspension system). Due to thickness of the strut cylinder being stronger, the inverted tube can bring more excellent stability, durability; in addition, it can withstand high impact forces and quickly response to variations in road conditions.

Most of applications come with “ Pillow ball Rubber Top Mount “ and most Mcpherson strut has camber adjustability but it still depends on car models.

Yes, the damping force of left and right shocks should be identical, otherwise it would cause unstable handling and uneven tyre thread wear. However, the damping force of front and rear shocks can not be always the same depending on different requirements.

Most of vehicle applications come with adjustable lower mount. Thread the lower mount upwards in order to drop the vehicle ride height, or downwards to raise the ride height. We do not recommend adjusting position of the spring seat to change the spring tension to lower the vehicle.

Everybody drives in their own unique style, therefore being able to adjust a car to fit how you drive is important. Things like seat and steering wheel adjustment are now common place. Suspension adjustability gives you the option of standard settings, sport settings, fast settings and even track day settings. Non-adjustable suspension is set on sport/fast settings all of the time, which may not suit your driving style every day.

Our standard spring rates directory can be found here

XYZ calipers have a one year limited warranty.

Material, friction, brake force and working temperature are different.

Yes, you can purchase the brake pads from the following well-know brands like AP, FERODO, EBC, HAWK … etc to fit on our big brake kit.

Our caliper is forged with finest aluminum material, than we CNC machine bolt holes precisely. They can work with ABS.

With our design, you can just install XYZ big brake kit on your car without any modifications. However, in some rare occasions, the modifications are required to fit our big brake kit.

The specification of XYZ 6 pot caliper is same as that of AP 4 pot caliper. But its width is slimmer than width of AP 4 pot caliper, the edge of our caliper does not touch the rim as far as possible.

The specification of XYZ 6 pot caliper is same as that of AP 4 pot caliper. But its width is slimmer than width of AP 4 pot caliper, the edge of our caliper does not touch the rim as far as possible.

Whether XYZ brake kit fits a stock wheel depends on applications. But our 330mm rotor requires a minimum 17” wheel size, and our 355mm requires a minimum 18” wheel size.

Check regularly for any cracks, deformation or warping and if so, relace it immediately. Rotors should be replace if any faults are discovered or if the rotor has worn below the minimum thickness of 1.0mm.

In case your rim is for 18 inch, it’s a wrong decision if the rotor size you choose for front brake kit is 355mm, and rear brake kit for 330mm. In our brake design, you are supposed to choose the same rotor size for front and rear brake kit, it’s because we have settle on the ratio for front and rear brake pads.

If you choose bigger rotor size in front brake kit but with smaller rotor size for rear, such as Front: 355mm/Rear: 330mm, consequently, the brake will be out of balance easily, and it will be dangerous if you brake suddenly.

If short, if the rim you have is 18 inch, then you must choose Front and Rear 355mm brake kit, and please don’t really think that smaller rotor size isn’t likely to touch the rim. It’s certainly a wrong decision as it’s easier to interfere with the wheel and more dangerous. Please see drawing 1 and 2.

Note: Please be sure the air in the brake fluid of caliper should absolutely exhaused then to fix the bleed nipples FIRST before doing the step as below.

Please follow the instruction back and forth three times at least to make sure there is no more brake oil coming out