GVM Upgrades — Pre & Post Rego, Engineer Certified | Sunshine Coast
Performance vs Adjustable Bypass vs DSV
Outback Armour Shocks and Struts Sunshine Coast
Outback Armour offers three main shock-absorber choices for many supported 4WDs: Performance, Adjustable Bypass and Digressive (DSV). The right range depends on how the vehicle is loaded, where it is driven and whether you want a fixed suspension tune or the ability to alter damping yourself.
Find Suspension for My 4WDThe Ute Shop can help select the correct springs, shocks and struts for your vehicle and professionally fit the suspension at our Warana workshop on the Sunshine Coast (4/43 Premier Circuit, Warana QLD 4575). Product availability and specifications vary by make, model, variant, axle and application.
Performance
Engineered for consistent daily driving, weekend touring, and moderate towing. High-velocity valving delivers controlled handling and eliminates factory body roll without the need for manual adjustments.
Adjustable Bypass
Ultimate on-the-fly versatility. Instantly tune between plush comfort for unladen highway cruising and firm damping control when hooking up a heavy caravan, boat trailer, or fully loaded canopy.
Digressive (DSV)
Heavy-duty workhorse built for non-stop outback corrugations, station tracks, and heavy fleet use. Digressive valving provides firm low-speed stability while effortlessly absorbing high-speed washboards.
Which Outback Armour shock range should I choose?
| Range | Damping | Best suited to | Main difference |
|---|---|---|---|
| Performance | Fixed conventional multi-disc valving | Daily driving, touring, towing and general 4WD use | Straightforward general-purpose upgrade with no user adjustment |
| Adjustable Bypass | 20+ stages of externally adjustable internal-bypass damping | Changing loads, mixed roads and drivers who want to tune comfort versus control | Adjustment dial changes damping response without replacing the shock |
| DSV / Digressive | Fixed digressive valving | Corrugations, rough roads, remote touring and sustained severe off-road work | Heavy-duty 65 mm construction, foam-cell design and heat-focused components |
Performance suits most general-purpose builds; Adjustable Bypass suits drivers who regularly change cargo, accessories or terrain; DSV is the fixed heavy-duty choice for repeated corrugations and demanding off-road conditions.
📖 View Full Engineering Specs, Valving Analysis & FAQs
Outback Armour Performance shocks and struts
Performance is Outback Armour’s fixed-valving general-purpose range. It is intended to provide stronger, more controlled damping than a tired or lightly specified original setup while remaining straightforward to own – there is no external dial to adjust.
Typical Performance-range construction
- 60 mm twin-tube body on the verified example products
- 36 mm or 40 mm high-flow performance piston depending on the application
- Heavy-duty multi-disc valving
- Nitrogen gas over semi-synthetic oil to help reduce fade at higher temperatures
- 18 mm hard-chromed piston rod and high-temperature multi-lip Viton seal on verified examples
- Vehicle-specific strut legs, spring seats, bushes and fitting hardware where applicable
Best suited to: daily driving, weekend touring, towing and general 4WD use where the vehicle setup is reasonably consistent and the owner wants reliable fixed damping without regular adjustment.
What “fixed valving” means
The damping curve is set inside the shock absorber. The driver does not select softer or firmer settings externally. The shock is still velocity sensitive – it responds differently as piston speed changes – but the tuning cannot be altered with a user control.
Outback Armour Adjustable Bypass shocks and struts
Adjustable Bypass adds an external control to Outback Armour’s internal-bypass damping system. Outback Armour states that applicable shocks and struts provide more than 20 stages of velocity-sensitive damping adjustment, allowing the driver to change the balance between comfort and body control.
Why choose Adjustable Bypass?
- Tune the suspension when accessories or cargo loads change
- Use a more comfort-focused setting for lighter loads or rough surfaces
- Add damping control for heavier loads, towing or more demanding terrain
- Fine-tune front and rear behaviour to suit personal ride preference
- Retain a compact twin-tube design without an external reservoir on the verified examples
Outback Armour’s instructions say increasing bypass toward “−” favours comfort, while decreasing bypass toward “+” increases control. Follow the setting and servicing instructions for the exact product.
Outback Armour recommends regular use and maintenance of the adjustment dial to preserve long-term operation. The dial changes damping; it does not alter spring rate, payload rating or GVM.
Outback Armour DSV / Digressive shocks and struts
The Digressive – or DSV – range is Outback Armour’s fixed heavy-duty option for harsh off-road conditions. Outback Armour specifically positions it for constant corrugations, rough mining roads, outback stations and other environments where heat, repeated impacts and body movement must be controlled for extended periods.
How digressive valving behaves
Digressive valving builds relatively strong damping force at lower piston speeds, helping control body roll, pitching and steering inputs. As piston velocity increases over sharper bumps and corrugations, the damping curve becomes less aggressive relative to speed, allowing the suspension to move and absorb rough terrain rather than becoming progressively harsher.
Verified DSV features
- 65 mm heavy-wall twin-tube body
- 40 mm high-flow digressive piston
- 18 mm hard-chromed piston rod
- NBR foam-cell construction
- Internal top-out stop and internal baffle systems
- Integrated external heat sink
- High-temperature multi-lip Viton seals plus additional wiper/scraper seals
- Extreme-duty fully synthetic Fuchs oil formulated for temperature stability and resistance to aeration
Best suited to: frequent corrugations, remote touring, heavily worked fleet or mine vehicles and drivers who want a durable fixed digressive tune rather than a user-adjustable system.
Detailed difference at a glance
| Feature | Performance | Adjustable Bypass | DSV / Digressive |
|---|---|---|---|
| User adjustment | No | Yes – 20+ stages | No |
| Valving approach | Fixed multi-disc performance valving | Velocity-sensitive internal bypass with external dial | Fixed digressive valving |
| Verified body size | Typically 60 mm | 60 or 65 mm depending on application | Typically 65 mm heavy wall |
| Verified oil / gas design | Nitrogen gas over semi-synthetic oil | Application-specific; confirm product listing | Foam cell with fully synthetic Fuchs oil |
| Ride priority | Balanced general-purpose control | Driver-selected comfort versus control | Body control plus rough-terrain compliance |
| Ideal use | Road, touring, towing and moderate off-road use | Variable loads and mixed conditions | Corrugations, heat and sustained severe use |
| Ownership | Set-and-forget | Dial should be used and maintained regularly | Set-and-forget heavy-duty tune |
The figures above describe verified examples and the overall range positioning. Body diameter, piston size, construction and front/rear availability can vary by vehicle. We use the exact Outback Armour listing for the selected part number.
Are shocks and struts the same?
Both control suspension movement, but they are not always the same type of component. A shock absorber is a separate damper. A strut is a structural suspension assembly that commonly locates the wheel and carries the coil spring. Many utes and 4WDs use front struts and separate rear shocks, although layouts vary.
Springs, load and GVM still matter
A shock absorber controls motion; the spring supports the vehicle’s weight. The correct spring rate must be selected for the vehicle’s permanent accessories and typical load. Changing shocks alone does not increase legal payload, axle ratings or GVM. A certified GVM upgrade is a separate vehicle-specific package and approval process.
Which range fits your use?
Choose Performance when…
- Your accessories and usual load remain fairly consistent
- Most driving is on-road with touring, towing or moderate off-road use
- You prefer a straightforward fixed setup without adjustment controls
- You want a capable suspension upgrade at the entry point of these three ranges
Choose Adjustable Bypass when…
- The vehicle alternates between empty, loaded and towing conditions
- You drive sealed roads, corrugations and trails and want to alter the ride for each
- You are willing to learn the settings and exercise/maintain the adjustment dials
- Personal ride preference is important and you want external tuning control
Choose DSV when…
- The vehicle regularly faces sustained corrugations or harsh off-road work
- Heat management and resistance to fade are major priorities
- You want fixed digressive behaviour that controls body movement but releases over faster suspension inputs
- Remote touring, mining, station or demanding fleet work is a major part of the vehicle’s use
Outback Armour suspension fitting Sunshine Coast
The best shock range still needs the correct vehicle-specific springs and professional installation. The Ute Shop can assess the make, model, variant, accessories, constant load, towing use, desired ride height and intended terrain before recommending an Outback Armour suspension package.
- Locally owned Sunshine Coast ute and 4WD accessory specialist
- Showroom and professional fitting workshop in Warana
- Suspension advice based on vehicle use and permanent load
- Wheel-alignment and post-fit checks can be coordinated as required
- GVM-upgrade options available for supported vehicles where a certified package is required
Request a suspension quote
Tell us your vehicle make, model, build date and variant, plus the bullbar, winch, canopy, drawers, long-range tank, towing load and other permanent accessories. We can recommend the appropriate spring load and confirm whether Performance, Adjustable Bypass or DSV is available for your vehicle.
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Frequently asked questions
What is the main difference between Outback Armour Performance and Adjustable Bypass?
Performance uses fixed valving. Adjustable Bypass provides more than 20 external settings so damping can be altered for comfort, control, cargo, accessories and terrain.
Is DSV better than Adjustable Bypass?
Not automatically. DSV is designed as a fixed heavy-duty digressive option for corrugations and sustained harsh use. Adjustable Bypass is better when you value tuning flexibility for changing loads and conditions. The correct choice depends on the vehicle and its work.
What does digressive valving mean?
It provides relatively strong low-speed damping to control roll and pitching, then the damping curve becomes less aggressive relative to piston speed so the suspension can move over sharper bumps and rough terrain.
Does the Adjustable Bypass dial change ride height?
No. It changes damping response. Ride height and load support primarily come from the springs and the vehicle-specific suspension geometry.
Do all three ranges fit every 4WD?
No. Availability, front and rear combinations, body sizes and part specifications differ by make, model, year, variant and intended suspension package.
Will upgraded shocks increase my GVM?
No. Shocks alone do not increase the legal GVM, payload or axle ratings. A GVM upgrade must use an approved vehicle-specific package and the required certification process.
Can The Ute Shop fit Outback Armour suspension?
Yes. The Ute Shop can provide vehicle-specific advice and professional suspension fitting from its Warana workshop on the Sunshine Coast.
Tell us the make, model, year and variant and what you want fitted, and we will come back with the right options and a price for the parts and the fitting.
Workshop Buyer's Guide & Technical Fitment Advice
ADR Compliant
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A GVM upgrade raises the Gross Vehicle Mass your ute is legally allowed to weigh when it is loaded - the number on the compliance plate, not a suspension setting. It matters because a modern dual cab leaves the dealership with far less usable payload than most owners assume. Fit a steel bull bar, a winch, a canopy, a dual battery system, a set of drawers and a full long range tank, then add four adults and a week of gear, and a 3,200kg-rated ute can be over its plated limit before it leaves the driveway. Overloaded is not a technicality: it voids insurance, it fails a roadside inspection, and it changes how the vehicle brakes and steers on the Bruce Highway with a van behind it.
What actually changes
A certified upgrade replaces the springs, shock absorbers and, depending on the kit, the leaf packs, bump stops, U-bolts and brake components with heavier-rated equivalents, then re-plates the vehicle at the new mass. The paperwork is the part that makes it legal. You receive a compliance or modification plate and the certification documents that go with it, which is what your insurer and a transport inspector will ask for. Heavier springs on their own are not a GVM upgrade, no matter how much extra load they carry - a distinction that catches a lot of people out.
Pre-registration and post-registration - we do both
There are two routes and they are not interchangeable. A pre-registration upgrade is fitted before the vehicle is first registered and is complied by the supplier under second stage manufacture, so it arrives with federal approval already attached and is generally the cleaner path if you are buying new. A post-registration upgrade is fitted to a vehicle already on the road and is certified by a licensed engineer under Queensland's modification code. The Ute Shop handles both. Which one applies comes down to where your vehicle is in its life, so it is worth a conversation before you order - and if the limit you keep hitting is the combined vehicle-and-trailer figure, a GCM upgrade is a different job again.
Brands and kit options
We are an authorised dealer for the suspension brands we carry, which is what keeps the manufacturer's warranty intact on a fitted kit. The GVM range here is built around Lovells, with Outback Armour, Tough Dog, Dobinsons, EFS 4x4 and ORI covering the lift kits, shock absorbers and spring packs that sit underneath. The differences between them are real and worth understanding: some kits are tuned for constant heavy load and ride firm when the tray is empty, others are progressive and stay comfortable unladen but give up a little control at full weight, and remote-reservoir shocks earn their keep on corrugated dirt but are more than most tradies driving to sites around Kawana will ever use. Load levelling airbag suspension is a different tool again - it manages a variable load, it does not raise your legal limit.
Vehicles we upgrade
Kits are available for the Ford Ranger and Raptor, Toyota HiLux, Isuzu D-MAX, Toyota LandCruiser 79, 200 and 300 Series, Mitsubishi Triton, Mazda BT-50, Volkswagen Amarok, Nissan Navara and Ford Everest, plus the American trucks we specialise in - RAM 1500, RAM 2500 and 3500, and the Chevrolet Silverado. Availability varies by model and build year, because each kit has to be certified for that specific vehicle rather than adapted from a similar one.
Supplied and fitted at Warana
Everything we sell can be supplied and fitted in our own workshop at 4/43 Premier Circuit, Warana, on the Sunshine Coast - one workshop, our own fitters, not a franchise network. We do the measure-up, the fitting, the wheel alignment afterwards and the certification paperwork, and we will tell you honestly if the load you are describing does not need an upgrade at all. Customers come to us from Kawana, Caloundra, Maroochydore, Mooloolaba, Buderim, Nambour, Noosa, Gympie and Caboolture, and we deliver Australia-wide for owners fitting their own. Tell us what you tow, what you carry and what you have already bolted on, and we will quote the whole job.
Common questions
Will a GVM upgrade let me tow more?
Not on its own. GVM is what the loaded vehicle may weigh; the combined vehicle-and-trailer figure is the GCM, and towing capacity is separate again. Some kits raise GVM only, some raise both. If the limit you keep running into is with the van hooked up, tell us that up front - it changes which kit is the right answer.
Can it be done after the vehicle is registered?
Yes. A post-registration upgrade is certified by a licensed engineer rather than by the supplier, and it is a completely legitimate route. Pre-registration upgrades are complied by the supplier before first registration. We do both.
Will it ruin the ride when the ute is empty?
It can if the kit is chosen badly - the most common complaint about GVM upgrades. A constant-load kit on a ute that spends five days a week empty feels harsh. Tell us how the vehicle is actually used and we will match the spring rate to that.
Does the upgrade affect my new vehicle warranty?
We are an authorised dealer for every brand we fit, so the components carry their own manufacturer warranty, and we supply the full certification pack with every upgrade.
Why buy and fit with The Ute Shop
- Authorised dealer: We are an authorised dealer and distributor for every brand we carry, so your warranty is supported through the manufacturer.
- ADR compliant: All products we supply are compliant with the Australian Design Rules.
- GVM upgrades, pre and post rego: We do both. Pre-registration upgrades are complied by the supplier; post-registration upgrades are complied by a certifying engineer.
- Fitted in-house at Warana: One workshop, not a franchise network: 4/43 Premier Circuit, Warana. We serve Kawana, Caloundra, Maroochydore, Mooloolaba, Buderim, Nambour, Noosa, Gympie and Caboolture, with nationwide delivery.
- 14 years, locally owned: Locally owned and operated on the Sunshine Coast for 14 years.
Our trade specialists ensure correct dual cab payload rating, ADR compliance, and flawless fitment at our Warana workshop.