These Stanceparts air cup kits will fit a lot of coilover kits with the exception of some large diameter inverted dampers. - Get in touch if you're unsure about your kit.
The kit sits between the main spring and the spring top cup on the coilover and is just 20mm when not inflated. At full extension the cups measure approximately 70mm, so provide approximately 50mm of lift.
Stiff spring rates can reduce how much the kit lifts, and helper springs or spring droop are sometimes recommended when fitting these cups, so they are not fighting the main spring rate too much in addition to the weight of the car.
When used with HSD & Driftworks Coilovers we have a variety of parts & springs available, so will do our best to assist in making this kit work correctly as best as possible. With other coilover brands additional parts may be required that we may not be able to source.
The air cups should fit any brand of coilovers, as long as they meet the requirements below.
Make sure the dimensions match your coilover, we strongly recommend to measure with a caliper. You will also need to ensure you have adequate clearance on your car to support the cups.
• The outer diameter must be less than 99mm.
• The inner diameter must be 61 mm or more.
• Measure the thickest part of the coilover shaft. Kits are available for coilover shaft diameters:12,5mm, 14mm, 15mm, 16mm, 18mm, 20mm and 22mm
The air cup lift system will only fit on linear springs, it will not fit on ''shaped'' springs as shown in the figure. If you have ''shaped'' springs, it's often possible to install linear springs.
High spring rates
If you're using extreme high spring rates, higher than the original rates that came with your coilovers, then it's possible that you can't use the full 50mm lift from the air cups. Due to the extreme high spring rates, the weight of the car won't compress the springs and damper enough to create a stroke for the air cups to lift. This can be solved by using helper springs.
• The diameter of the air cup is 120 mm.
• The fitting is 17mm.
The air cup is only 20mm thick in the lowest position. Depending on your coilovers and vehicle, the air cups will generally take up 20 to 30mm of space. If you have enough travel left on your coilovers to lower it, this won't be a problem. If not, you can install shorter springs to compensate.
HOW DOES IT WORK?
The air cup is mounted on the top of the spring and just acts like a spacer. When you put pressure in the system, the air cup will expand and the car will raise up to 50mm. The air cup lift system does not affect the ride quality and performance of your coilovers.
• Max total car weight: 2000 kg / 4400 lbs (or max axle weight: 1300 kg / 2850 lbs)