Instant lift with 2 gallon tank.
This kit includes everything you need to install the air cup lift system:
• 4 air cups
• 150psi compressor setup with 2 gallon tank
• Wiring harness
• 2x 3-way valve
• Pre-wired 16mm LED switch (1 switch, operate front + rear at the same time)
• 12 meters airline
• 3x t-splitter

Stanceparts Air Cups can be used together with our BC Racing coilovers, which are one of the most popular suspension upgrades for drivers who want improved handling, adjustable ride height, and a better-looking stance. But for many lowered cars, everyday driving can still be a challenge — steep driveways, speed bumps, car parks, and rough roads can quickly become a problem.

That’s where Stanceparts air cups are the perfect add-on.

Unlike full air suspension, Stanceparts air cups allow you to keep the performance and feel of your BC Racing coilovers while adding temporary lift when you need extra clearance. You can drive at your normal lowered ride height, then raise the car at the push of a button to get over obstacles safely.

This makes them ideal for street cars, show cars, and weekend builds where you want the handling benefits of coilovers without sacrificing practicality.

Why they work well together:

• Keep the performance feel of BC Racing coilovers
• Add temporary lift for driveways, speed bumps, and ramps
• Great for low cars that are still driven regularly
• Cleaner and more practical than constantly adjusting ride height
• Ideal for street, show

For customers who love the look and handling of BC Racing coilovers but need more real-world clearance, Stanceparts air cups are one of the best upgrades to complete the setup.

If you need help matching the correct Air cup to your BC Racing coilovers - please feel free to call us or email us first before purchasing
 

FITMENT REQUIREMENT

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

Max total car weight: 2000 kg / 4400 lbs
(Limited for 40- 45mm cups: 1750 kg / 3850 lbs)
 

STEP 1

Checking coilover clearance and springs

 

CLEARANCE

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

 

SPRINGS

The air cups can only be installed on linear springs and will not fit on 'shaped' springs, as shown in the figure. In most situations, it is possible to replace shaped springs with linear springs.

 

 

STEP 2

Measuring shaft and spring diameters

 

DAMPER SHAFT

Measure the thickest part of the shaft with a caliper, measure below any rings or clips.

Air cups are available for coilover shaft diameters: 12.5mm, 14mm, 15mm, 16mm, 18mm, 20mm, 22mm, 25mm, 40mm, 44mm, 44.2mm, 44.5mm and 45mm.

 

SPRING DIAMETER

Maximum outer diameter: 98mm (89mm for the smaller 110mm air cups).
Minimum inner diameter: 60mm (57mm on request).

There might be a code on the spring indicating the inner diameter, such as 60, 61, 62, or 65 for ID60, ID61, ID62, and ID65mm springs, which are all fine! For example, "62-200-008" means it has an inner diameter of 62mm.

 

 

STEP 3

Installation

 

RIDE HEIGHT

In most cases the air cup will take between 20 and 30mm of height. The stack height of the air cup itself is 20mm but 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 will need to install shorter springs.

 

SPRING ADJUSTMENT

The lift from the air cups requires droop / rebound from the coilovers. If you don't have enough droop, the air cups can't lift the full 50mm. The damper strut simply will top out before achieving the full lift. If you're using the standard spring rates that came with your coilovers, it should be fine. If you're using higher spring rates we recommend to use helper springs to get the full lift.

 

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.

 

 

SEPARATED REAR SPRING AND SHOCK

Custom rear cups

 

FITMENT REQUIREMENT

Custom rear cups are available for a limited selection of cars with a separate rear spring and shock. Linear springs required, minimum length with air cups installed: 150mm.

We have 2 versions of custom rear cups available:

50mm custom rear cup
- Height adjuster thread diameter: max 50mm
- Minimum spring inner diameter: 62mm
- Maximum spring outer diameter: 105mm

53mm custom rear cup 
- Height adjuster thread diameter: max 53mm
- Minimum spring inner diameter: 65mm (!)
- Maximum spring outer diameter: 105mm

 

 

INSTALLATION:

The custom rear cup will take 30mm of height, If there is enough thread left spring perch to lower the springs, it won't be a problem. If not, you will need to install shorter springs.

Custom rear cup specifications:
- Diameter: 130mm
- Height: 83mm
- Air cup stroke: 25mm (resulting in an actual lift of 40-50mm due to the suspension geometry).

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.

FAQ

1, Can I drive pressurized ? (lifted)

You can drive with the system pressurized (lifted) for a short period, for example on bad roads. However, the system is not designed to be constantly driven while pressurized (lifted).

The maximum speed while driving with the system pressurized is 60 km/h (40 mph).