Toughdog 4 Inch Suspension Lift Kit — Toyota LandCruiser 105 Series

This Toughdog kit provides approximately 100mm (4 inches) of lift height measured at the chassis, though actual lift may vary between 95-105mm depending on your vehicle's current condition, accessory weight and selected spring rates. The lift is achieved through raised front and rear coil springs specifically designed to maintain proper suspension geometry while increasing ground clearance. Heavier constant loads will compress springs slightly more, potentially reducing lift by 5-10mm, which is why selecting the correct spring rate for your actual accessory weight is crucial. After the initial 500km break-in period, springs typically settle an additional 5-10mm, which is factored into Toughdog's engineering specifications.

This comprehensive kit includes your choice of either four 41mm foam cell shock absorbers or four 45mm big bore adjustable shocks, front raised coil springs (comfort/medium or constant load), rear raised coils (0-300kg variable or constant 300kg), 3 degree castor correction bushes, extended rubber brake lines for front and rear, adjustable front panhard rod, adjustable rear panhard rod, and all necessary mounting hardware. The kit provides everything needed for a complete 4" lift installation except upper control arms, which are sold separately but recommended for optimal suspension geometry. You select your preferred shock type and spring rates during checkout based on your specific vehicle setup and intended use.

Yes, this Toughdog kit significantly improves towing performance when the correct rear spring rate is selected for your typical towing weight. The rear coil springs are available in 0-300kg variable rate or constant 300kg configurations, both of which provide substantially better load support than factory springs, reducing squat and improving stability when towing caravans, camper trailers or equipment trailers. The upgraded shock absorbers (particularly the 45mm adjustable option) dramatically improve damping control under towing loads, reducing sway and porpoising. For maximum towing performance and flexibility, many customers pair this lift kit with supplementary airbag suspension which allows on-demand load adjustment while maintaining excellent unladen ride quality for daily driving.

While not absolutely mandatory, upgraded upper control arms are strongly recommended for 105 Series LandCruisers lifted 4 inches to optimize suspension geometry, improve castor angle and correct ball joint angles that are affected by the increased ride height. This lift kit includes 3 degree castor correction bushes which address basic geometry issues, but aftermarket control arms with greater adjustment range provide superior steering feel, reduced tyre wear and better high-speed stability. Many experienced 4WD enthusiasts install control arms at the same time as the lift kit to avoid the need for additional wheel alignments and to maximize the performance benefits of their suspension investment. Our technical team can recommend specific control arm options suited to your 105 Series configuration and intended use.

Yes, a complete four-wheel alignment is absolutely mandatory after installing any suspension lift kit, and this 4" Toughdog system is no exception. The substantial increase in ride height alters castor, camber and toe angles significantly beyond factory specifications, which will cause rapid and uneven tyre wear, poor handling and potential safety issues if not corrected. Your alignment technician must adjust castor using the included correction bushes, set camber within manufacturer specifications, and adjust toe settings on both front and rear axles. Most reputable 4WD suspension installers include wheel alignment as part of their installation service, and attempting to drive your vehicle without proper alignment after a lift kit installation can damage tyres and suspension components within just a few hundred kilometres.

Yes, selecting different spring rates for front and rear is not only possible but essential for achieving optimal ride quality and load support on your 105 Series LandCruiser. The front spring rate should be selected based on your constant front accessory weight (bull bar, winch, intercooler, dual batteries), with options including comfort/medium or constant load configurations. The rear spring rate is chosen separately based on your typical rear load (rear bar, spare wheels, fuel tanks, drawer systems, rooftop tent), with options for 0-300kg variable rate or constant 300kg rating. During checkout, you'll specify both front and rear spring preferences independently based on your actual vehicle setup. Our suspension experts can help you calculate your accessory weights and select the ideal spring combination for your specific touring or work requirements.

With this 100mm lift installed on your 105 Series LandCruiser, you can typically fit tyres up to 33 inches (285/75R16 or 265/75R17) with minimal to no trimming of wheel arch plastic or body metal, though exact fitment depends on wheel offset, tyre brand (some run larger than stated) and suspension articulation. Some enthusiasts run 35 inch tyres with this lift height but expect to perform minor trimming and potentially fit wheel spacers for clearance. Remember that larger, heavier tyres add significant unsprung weight which affects ride quality and braking performance, and may require recalibration of your speedometer to maintain accuracy. Always test-fit tyres at full steering lock and full suspension compression before committing to a specific size, and ensure your wheel offset provides adequate clearance from control arms and chassis components throughout the suspension travel range.

All Toughdog suspension components are backed by comprehensive manufacturer warranty coverage that protects against defects in materials and workmanship, with specific warranty periods varying by component type (shocks, springs, hardware). Warranty coverage requires professional installation by a qualified mechanic or 4WD suspension specialist, retention of original purchase documentation and installation receipts, and adherence to specified service intervals and break-in procedures. Warranty does not cover damage from incorrect installation, vehicle accidents, competition use, or failure to maintain proper wheel alignment. Toughdog has an established national warranty network across Australia, ensuring you can access warranty service and support whether you're in metro areas or regional centres. Contact us for specific warranty duration details for individual components in this kit.

Yes, when correctly installed with appropriate spring rates for your actual load, this Toughdog kit delivers excellent on-road comfort and highway stability suitable for daily commuting, long-distance touring and regular highway driving. The 41mm foam cell shock option provides exceptional ride comfort approaching factory quality, while the 45mm adjustable shocks allow you to dial in your preferred damping firmness for highway cruising versus off-road use. The included castor correction bushes and adjustable panhard rods ensure proper steering geometry and axle alignment for confident high-speed handling. Unlike budget lift kits that compromise on-road manners for off-road capability, Toughdog engineering focuses on delivering balanced performance across all driving conditions, making this kit ideal for vehicles used as both daily drivers and weekend touring rigs.