EFS4WD
Reference: DMX-18HDE
Leaf Springs
EFS HD Rear Leaf Spring, +50 mm Lift, 5+2 Leaves — D-Max & BT-50
Heavy-duty EFS rear leaf spring in a 5+2 leaf configuration, lifting the rear by 50 mm and carrying an extra 150-250 kg. Fits the Isuzu D-Max and Mazda BT-50 TF from 2020. Japanese SUP9 and SUP9A spring steel with a graphite coating and PTFE inserts to cut friction. Price per piece; two per vehicle.
EFS HD Rear Leaf Spring, +50 mm Lift, 5+2 Leaves — Isuzu D-Max & Mazda BT-50 from 2020
The factory spring on a D-Max or BT-50 is rated for an empty tray and a light load. Add a canopy, drawers, a water tank and a full kit and the rear sits down, the clearance disappears and the towbar starts touching on every decent bump.
This spring turns that around: a 5+2 leaf pack lifts the rear by two inches and carries an extra 150-250 kg. Instead of fighting the suspension you get a vehicle that holds its ride height even fully packed.
Lift +50 mm (+2") | Leaf pack 5+2 | Additional load 150-250 kg |
Key benefits
- Japanese SUP9 and SUP9A spring steel — chosen for cyclic loading rather than a one-off load rating.
- Tapered leaf ends reduce friction between leaves, which helps spread the load evenly across the whole pack.
- A graphite coating and PTFE inserts cut friction and the squeak and knock that come with it.
- Shot peening and a deflection test during production limit residual stress and add to the spring’s working life.
- A pack clamp and an extra wrapped leaf protect against delamination — the most serious way a leaf spring fails.
- The 50 mm lift gives you real clearance and room for a larger tyre.
Technical data
- Brand: EFS 4WD
- Part number: DMX-18HDE
- Type: heavy-duty rear leaf spring
- Pack: 5+2 leaves
- Lift: +50 mm (+2")
- Additional load: 150-250 kg (distributor data)
- Material: Japanese SUP9 and SUP9A spring steel
- Finish: graphite coating, PTFE inserts, shot peened
- Recommended polyurethane bushes: part number UK870
- Weight: 24.5 kg (manufacturer data)
- Quantity required per vehicle: 2 pieces (manufacturer data); the price covers one piece
What else you will need
The distributor notes that the springs should be fitted with polyurethane bushes, part number UK870. EFS lists a required quantity of two springs per vehicle, and the price here is for a single spring.
Who it is for
This is the pick for a D-Max or BT-50 that genuinely works: canopy build, roof tent, water tank, trailer, long trips. If your truck permanently carries a few hundred kilograms, the heavy-duty 5+2 pack fixes the sagging rear and raises the ride height at the same time.
Fitting notes
- Leaf springs are replaced in pairs — two per vehicle.
- Plan a set of UK870 polyurethane bushes and new u-bolts alongside them; the old u-bolts have already been stretched.
- After a 50 mm rear lift it is worth checking the geometry and the headlight aim.
Warranty
The distributor states 5 years with no mileage limit for this spring.
Why buy it
- One part raises the rear and increases load capacity, instead of stacking on helper leaves and airbags.
- The anti-friction measures mean a quieter pack and less wear over time.
Building a trip-ready suspension? Get in touch — the Szekla4x4 workshop puts packages like this together every week and can help match the spring to what your vehicle actually carries.
Frequently Asked Questions
How many springs do I need per vehicle?
Two. EFS lists a required quantity of 2, and the price here is for a single spring.
Do I need anything else?
Yes. The distributor notes that the springs should be fitted with polyurethane bushes, part number UK870.
How much extra load will it carry?
The distributor states 150-250 kg of additional load; EFS describes this spring as the 250 kg constant-load version.
How much lift does it give?
Around 50 mm, or 2 inches.
What warranty applies?
The distributor states 5 years with no mileage limit.
