ONAIR BUILD SERIES / 001 / VOLKSWAGEN
A daily-driven Mk7.5 GTI. Brand-new BC Racing coilovers. And a different direction for the build: adjustable air suspension with a clean, carefully finished trunk setup.
George was already running a serious suspension setup when he found ONAIR nearby. What he wanted next was more flexibility: usable ride height for daily driving, a lower stance when parked and a system that would feel at home in his GTI. This build became a custom conversion, not a one-size-fits-all swap.
- VEHICLE
- Volkswagen Mk7.5 GTI
- SUSPENSION
- BC Racing coilover-to-air conversion
- CONTROL
- ONAIR 2V management
- AIR SUPPLY
- 3-gallon tank + single ONAIR 480 compressor
- TRUNK FINISH
- Hardwood-style floor + custom hardlines
- MOISTURE CONTROL
- Manual water trap
01 / SUSPENSION
FROM COILOVERS TO AIR.
The important part of this build happened before the air springs were fitted. George's BC Racing coilovers were measured for shaft length, damper body dimensions, available stroke and collar spacing. Those measurements informed the custom air spring components produced for his existing dampers.
Why go through that process? An air conversion needs more than a sleeve that happens to slide over a shock. The mounting arrangement and available travel need to make sense for the specific hardware and vehicle. By starting with measurements, the team could work toward a proper fit while retaining the character of George's coilover-based setup.
02 / THE AIR SUPPLY
A TRUNK THAT LOOKS INTENTIONAL.
George wanted a tidy installation rather than an oversized show display. ONAIR built a new floor on an MDF foundation, then finished it with a hardwood-style surface. The result gave the trunk a more deliberate appearance and a place for the system components to sit together.
A seamless 3-gallon tank anchors the layout alongside a single ONAIR 480 compressor. A tank-mounted pressure gauge provides a direct pressure reading, while a manual water trap creates a practical point for moisture maintenance. A green coiled airline kit adds a useful detail for air tools.
SMALL DETAILS MAKE THE DIFFERENCE.
Painted silver hardlines connect the compressor and tank, with additional hardline work around the manifold. Careful spacing and consistent routing turn a group of pneumatic components into a composed installation. Those lines still need to be properly supported, connected and inspected as part of normal system upkeep.
03 / MANAGEMENT
KEEPING CONTROL SIMPLE.
George chose ONAIR's 2V management system because he wanted straightforward adjustment without unnecessary complexity. His original setup included a wireless key fob and preset control for convenient height changes. The controls fit the aim of the build: a clean daily driver that can change its stance when needed.
As with any pressure-managed system, the right driving height should be chosen with adequate clearance and travel, not simply by chasing the lowest possible position.
04 / FINAL CHECKS
THE FITMENT IS THE PAYOFF.
Once the hardware and trunk layout were in place, the team dialed in ride height, inspected connections and checked the system for leaks. That final stage is what brings the mechanical work and the visual result together: a GTI that can sit low for photos and return to a suitable driving height for the road.
