FITMENT – Stanceparts

FITMENT REQUIREMENT

The air cups will fit any brand coilovers, as long as they meet the requirements.
Please follow the steps below before ordering.

FITMENT REQUIREMENT

The air cups will fit any brand coilovers, as long as they meet the requirements.
Please follow the steps below before ordering.

STEP 1

Checking coilover clearance and springs

CLEARANCE

Make sure you have enough clearance around the coilovers, the air cups are 120mm in diameter, the fitting is 17mm. (110mm air cups available on request)

SPRINGS

The air cups can only be installed on linear springs, it will not fit on ''shaped'' springs as shown in the figure. In some situations shaped springs can be changed to linear springs.

STEP 2

Measuring

DAMPER SHAFT

Measure the thickest part of the shaft, we strongly recommend to measure with a caliper.
Air cups are available for coilover shaft diameters: 12,5mm, 14mm, 15mm, 16mm, 18mm, 20mm, 22mm and 40mm*

SPRING DIAMETER

Maximum outer diameter: 99mm.
Minimum inner diameter: 61mm. (57mm on request)

RIDE HEIGHT

In most cases the air cup will take between 20 and 30mm of height. The air cup itself is 20mm thick and with most coilovers the top hat comes on top of the air cup, this will take around 10mm. If there is enough thread left on the coilovers to lower the springs, it won't be a problem. If not, you need to install shorter springs.

SPRING ADJUSTMENT

The lift from the air cups comes from the droop / rebound of the coilovers. If you don't have enough droop, the air cups simply can't lift the full 50mm. A side effect of this is that when the air cups can't lift the full 50mm, the remaining lift will be compressing the spring. Depending on how much, this can cause a stiffer ride when aired up. (without the system in use, it won't affect your coilovers in any way) If you're using the standard spring rates that came with your coilovers, it should be fine.

WHAT IS DROOP?

Droop, also called rebound, is basically the amount of travel you have between ride height and full extension. Too much preload will decrease droop, we recommend to set a minimal preload. If you're using extreme high spring rates, higher than the original rates that came with your coilovers, the weight of the car won't compress the springs enough to create enough droop. This problem can be solved by installing helper springs, these will create enough droop for the air cups to lift.
Max total car weight: 2000 kg / 4400 lbs * Limited for 40mm cups: 1750 kg / 3850 lbs
The air cup lift system does not affect the ride quality and performance of your coilovers.

The process of assembly is clearly described in the manual. Click here for an online view of the manual.
An air cup lift system is also known as air cup suspension, an air cup kit or a coilover lift system.