Customspec
$6,000Reviewed before build
For road or competition builds that need a setup developed from scratch. Built around your car, its weight and what you ask of it, from an antique needing custom parts to an unfamiliar platform or a season-long programme. A car worth the effort is all it takes, not a race licence.
The price is the kit. Fitment, four-wheel alignment, corner-weighting and freight are separate: the services page has what each of those runs to.
Start with the spec sheet and we'll give you a ring to settle the build.
In a hurry? Ringing is faster than the sheet, and you get someone who builds them.
Where the chassis-development work lives. If your car is unusual, heavily modified, or you want a setup developed from scratch, this is the path. Custom past the standard envelope, exotic spring rates, priority servicing and rebuild, and a development program run with you across the season.
Nobody makes parts for your car? Perfect. We love new developments and first-in-Australia platform work, and this is exactly the conversation we want to have. Track support is available, even interstate or internationally under separate arrangement. Every kit is a 24-stage adjustable monotube, rebuildable for life, and when the program winds down the same dampers rebuild back to a Clubspec or Hillspec valving.
The price here is indicative and confirmed at consultation, once the programme and valving are scoped to your car.
Sold as Bespoke until September 2026. Same kit, new name.
The build
- 0124-stage adjustable high-flow
- 02CNC machined 10mm alloy , TIG-welded gusseted bases
- 03European OEM-quality seals, and serviceable for life
- 04Adjustable and spring , around 40mm typical drop
- 05 designed and tuned in Australia, manufactured with Korean partner Neotech since 2010
- 063 years / 100,000 km warranty, tool kit included
- 07New chassis development, race data review and trackside support
Built to suit
This one’s developed from scratch for your car. Tell us the platform and what you ask of it, and we’ll start the conversation.
Start a bespoke buildPrices include GST. Buying online lands late 2026, so for now a kit starts with a conversation: send an enquiry, or call us on 0473 584 884. We book the consultation from there, go through your car and how you drive it, and lock the spec in before anything reaches the bench.
Tell us about the car
Custom chassis development
This is the full workshop brief, and nothing is off the table: Customspec gets built to whatever the car has to do, whether that's a hypercar that still has to ride properly or a nine second drag car that only has to leave straight. Start with the build in your own words, then the handful of answers we do need before we can spec it. Skip the rest without a second thought, because plenty of it we'd rather measure ourselves anyway.
Your build, in your wordsThe one we need most. Write it the way you'd tell a mate at the workshop.0/1
- Describe your buildNot provided
The car, what it has to do, what's been changed and what you want from it. Weights, rates and measurements are welcome if you have them, and plain words are fine if you don't.
Your car0/1
Make, model or chassis codenot set
Under the bonnet0/1
- Engine, drivetrain and powerNot provided
Note a swap if there's been one.
How you drive it0/5
- What do you use the car for?Not provided
- How does that split by percentage?Not provided
- How much track driving have you done?Not provided
- Which circuits and hills do you run?Not provided
- Class or category you runNot provided
Tick everything that applies.
Rough is fine.
Sets how forgiving the valving is, and how wide an adjustment window you get.
Regulations often cap what we can do, so it helps to know early.
Springs and ride height0/3
- Spring rates, front and rearNot provided
- Target ride height, or drop from standardNot provided
- Anti-roll bars fittedNot provided
Whatever units they're marked in.
Brand and settings if you have them.
Tyres and aero0/5
- Tyre make, model and sizeNot provided
- Tyre classNot provided
- Aero fittedNot provided
- Downforce figure, if you've measured or modelled itNot provided
- Do you need to hold a rake or ride height window?Not provided
Measured, estimated or unknown are all useful answers.
What the car does now0/10
- What suspension is on the car now?Not provided
- Anything else changed underneath?Not provided
- Where in the corner does it misbehave?Not provided
- Do you log data?Not provided
- How much do compliance and safety margin matter, 1 to 10?Not provided
- How much do response, grip and lap time matter, 1 to 10?Not provided
- How do you want the car to feel?Not provided
- Who are we talking to?Not provided
- Does anyone else drive it?Not provided
- Anything else we should know?Not provided
The brand is enough. Pick from the list or type your own.
Springs, arms, bushes, subframe work, bracing: anything that changes what we valve for.
1 is don't care, 10 is very important.
1 is don't care, 10 is very important.
Fifteen points to share between the two. Comfort and response trade against each other, so spend them where it matters.
Just so the right person calls you back.
Describe the car in your own words. This is usually the most useful thing on the whole sheet.
Want it simpler?
Clubspec is the same damper specced on a call, from a handful of questions instead of a written brief. You can come back up later with a revalve.
See the Clubspec sheetStill to answer
- Describe your build
- What do you use the car for?
- How does that split by percentage?
- How much track driving have you done?
- Spring rates, front and rear
- Tyre make, model and size
and 5 more
What arrives in the box
Every kit ships as the same anatomy, specced to your car: anodised mounts, the knurled adjuster, and a serial number that ties your set to its build file in Monbulk.
The set pictured was built for the blue FD RX-7 in the Mighty Car Mods series. Springs, lengths, mounts and valving all move with the platform and the brief, so what arrives for your car will differ.
Quick answers
01What's the spec sheet, and do I have to fill it in?
It's the workshop brief: what the car is, how you drive it, and what you want out of it. On Hillspec it's optional, so fill in what you know and we cover the rest on the call. On Clubspec and Customspec it's how the build starts: those tiers are specced to your answers, so the more of it you fill in, the further along the build is before we even talk. Apart from your name, how to reach you, the state you're in and your car, nothing on it is compulsory, and none of it changes the price; whatever the sheet doesn't cover, the consultation does. The bigger the kit the more it asks, because there's more to decide: a street setup needs a handful of answers, a full bespoke program runs to a proper technical brief.
02What if I don't know the spring rates?
Skip them. Anything you might genuinely not know carries an "Unknown, please advise" option, and several of those numbers we'd rather measure ourselves anyway. Your answers stay in your browser as you go, so you can wander off and check something and come back to it.
03What if I'd rather not do the consultation call?
We keep trying, because that call is where the kit gets specced properly and we'd rather chase you than guess. If we still can't reach you, we build to the best spec for the car and the details you gave us. It's a backstop, not a way around the call.
04What happens after I get in touch?
We come back to you and book the consultation, and that's where we confirm the valve code, and for your car. It happens however suits you: at the workshop, on a video call walking the phone around the car, or over the phone. Nothing goes to the bench while we're still chasing you for it. Once the build is done you either book fitment at the Monbulk workshop or take the kit to your own.
05Can I fit this kit myself?
Yes. We'll walk you through fitting the kit and setting it up, including and alignment. Or bring the car to Monbulk and we'll do the lot.
06What warranty does the kit carry?
Three years or 100,000 km, and it stands for road driving, track days and competition. We don't void it because you race the car. When a set has done the kilometres we strip, inspect, re-valve and reassemble rather than replace it.
07Do you ship outside Australia?
Yes, kits go worldwide, and plenty have. Tell us where you are and we'll quote the freight before you commit to anything. Overseas builds are specced the same way as local ones, on a call or a video walk-around, and dampers can be posted back when a rebuild is due.
08Can I change tier later?
Yes, up or down, at any time. Hillspec, Clubspec and Customspec run the same , so moving between them is a or a rebuild of the set you already own, not a new kit. Book it like a service: the dampers come in, or get posted in, and go back out at the new spec.