RAW 4x4 Heavy-Duty Suspension Lift Kit – Isuzu KB300 / D-Max (2003–2012)

RAW 4x4 Heavy-Duty Suspension Lift Kit – Isuzu KB300 / D-Max Series (2003–2012)

Restore your bakkie’s load handling and upgrade its trail performance with the commercial truck-tough RAW 4x4 Heavy-Duty Suspension Kit for the Isuzu KB300 / D-Max Series (2003–2012), targeting the iconic KB300 D-Teq and D-Max models. Born from a legacy of heavy commercial vehicle engineering by Powerdown, this system eliminates the soft, wallowing unladen ride of the factory Isuzu while providing up to 45mm of ground clearance — carefully optimised to maintain safe velocity and angular thresholds for the front independent CV joints and steering ball joints.

This legendary workhorse platform uses a classic IFS with adjustable torsion bars paired with a leaf-sprung rear axle. The upgraded heavy-duty TB1501 Torsion Bars — thicker diameter than OEM to support steel bumpers and winches without sagging — and R-ISU03B Constant-Load Leaf Springs stop dangerous rear-end sag dead in its tracks. Equipped with heavy-duty Nitro shocks with multi-stage velocity-sensitive disk valving calibrated to eliminate the soft, wallowing front-end dive common to the stock Isuzu chassis.

Kit Components & Part Numbers

• Front Nitro Gas Shock Absorbers – Pair (G6098M3Y) – 35mm bore, 54mm outer tube, multi-stage velocity-sensitive disk valving
• Front Heavy-Duty Torsion Bars (TB1501) – thicker diameter than OEM; supports steel bumpers & winches without sagging
• Rear Nitro Gas Shock Absorbers – Pair (G6014M4Y) – matched rear damping
• Rear Heavy-Duty Leaf Springs (R-ISU03A) – Medium load, 0–150kg constant
• Rear Extra Heavy-Duty Leaf Springs (R-ISU03B) – Constant 300kg+ for RTT, canvas tents, canopies & drawers
• Polyurethane Bush & U-Bolt Fitting Kit (RAW-BU-ISU03) – complete hardware included

Technical Specifications

• Total Lift: 35mm – 45mm over factory ride height
• Kit Weight: ~58–63.5kg (heavy multi-leaf rear packs & thickened front torsion bars)
• Packaged Dimensions: 1,290mm × 450mm × 280mm
• Shock Bore: 35mm twin-tube | Outer Tube: 54mm thick-walled steel | Valving: Multi-stage velocity-sensitive disk

Important Installation Note

⚠️ The 2003–2012 Isuzu KB IFS platform requires a manual torsion bar crank during front installation. A professional wheel alignment is mandatory immediately after fitment to ensure correct caster, camber, and toe settings and prevent uneven tyre wear. We strongly recommend booking your alignment at the time of fitment.

Warranty

Industry-leading 3-Year / 60,000km Warranty — covers progressive leaf sagging, torsion bar fatigue, and high-pressure oil seal blowouts under extreme trail conditions.

Professional Fitment Available Nationwide

Prefer to have it fitted by experts? Advanced 4x4 offers professional fitment at our fitment centres across South Africa. Simply place your order online and contact us to book your fitment appointment at the centre nearest to you. Our technicians handle the torsion bar crank and post-fitment alignment as part of the service.

Selecting the Right Configuration

To ensure you receive the correct spring rate for your build, please specify your setup at checkout:

• Front-end weight: Standard Bumper / Replacement Steel Bullbar & Winch
• Rear-end setup: Light–Medium Loads (0–150kg) / Permanent 300kg+ Canopy, RTT & Camp Setup

⏳ Lead Time: Please allow 14 business days for production/sourcing if stock is not immediately available.