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Cubby House Fabworks

Big Bore Lift Kit — Bilstein 6112 2.5in Body + Platinum 630 Rear + Leaf Pack (Hilux N70/N80)

Big Bore Lift Kit — Bilstein 6112 2.5in Body + Platinum 630 Rear + Leaf Pack (Hilux N70/N80)

Regular price $4,609.47 AUD
Regular price Sale price $4,609.47 AUD
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Taxes included. Shipping calculated at checkout.
Vehicle
Leaf Pack Duty Tier
Add-ons
Not sure this suits your load or lift? Send me your vehicle and setup — I'll tell you straight what'll work.
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A complete front-to-rear lift package pairing Bilstein's 6112 B60 2.5in big-bore front coilover with a Bilstein Platinum rear shock, matched to a duty-rated leaf spring pack and fresh leaf spring bushes. Choose your vehicle (N70 or N80), your leaf pack duty tier, and optionally add a CalOffroad Fixed Upper Control Arm Kit (2° caster) to correct geometry at ride height.

Select the correct Vehicle before ordering. N70 (2005–2015) and N80 (2015-on) Hilux use different rear leaf spring packs and different shackles — they are not interchangeable. Use the Vehicle option above to pick N70 or N80; the leaf pack duty tier, the calculator below, and the parts we build for you are all matched to that selection.
Big Bore Lift Kit Calculator — Cubby House Fabworks
Spring Rate & Leaf Pack Calculator

Dial in front and rear.

A stock front axle sits at 1180kg on a 600lb coil, and a stock rear axle sits around 1000kg on a LD leaf pack. Every kilo you bolt on shifts both numbers — but only the fraction that actually lands on each axle. Tell us what's fitted and we'll work out the rest, front and back.

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Please fill in your setup below before ordering — it helps us make sure we build the right spec for your vehicle. Skipping it is fine, but the details help us get it right the first time.

80/20

Build this for how you actually drive — the daily commute, the school run, the odd weekend track — not the one loaded trip you do three times a year. Nobody enjoys a daily-driven brick just so it's ready for a trip it takes twice a summer. If your heavy trips are rare, tell us straight and we'll spec for the other 80%.

Lift Height

We only build 2in and 3in kits — see why below.

Selected lift height: ?

On the 6112, 2in lands on the 7th circlip — each clip is 5mm of adjuster travel, worth roughly 10mm of ride height. Nothing above 3in: past that, ride quality falls off fast for no real gain, and that's not what we build.

Rear Shock Length

Standard fits the factory bump stop. Long travel has a shorter closed length and needs a bump stop extension.

Long-travel shock: shorter closed length — we recommend running a bump stop extension so the shock isn't the first thing to bottom out.

Front-Mounted Accessories

Bull bar and winch hang off the front overhang, so essentially all of that weight loads the front axle.

Bull bar
Winch
Spot lights
LED bar or driving light pair mounted on the bar — about 100% loads the front axle.

Underbody & Chassis

Mounted between the axles, so only part of the weight transfers forward.

Rock sliders
~20kg/side along the chassis rail — about 35% of that reaches the front axle.
Bash / skid plates
Engine & transfer case plates sit forward of centre — about 75% transfers to the front.
Dual / extra battery
Engine bay, ahead of the firewall — about 90% loads the front axle.
An extra/dual battery sits off to one side of the engine bay, so that side needs a touch of preload dialled in to correct the one-sided weight. We'll set this for you.

Rear-Mounted Gear

Tray, canopy, boxes — mounted behind the cab, so this loads mostly onto the rear axle.

Tray
Tool Box
Canopy
~233kg average, fitted over the tub.
Dog box
~90kg average.
Rear bar
~57kg average.
Long range fuel tank
~200kg loaded.
Drawers
~81kg unloaded.
Fridge + drop slide
~44kg average.

Towing

Tow ball weight loads almost straight onto the rear axle.

kg
Front Result

Recommended Spring Rate

Suggested spring
600lb
Est. front axle load
1180 kg
stock
600 650 700 750 800
Rear Result

Recommended Leaf Pack

Uses the Vehicle option you picked above — N70 and N80 run different leaf packs and shackles, so getting this right matters. We've set the Leaf Pack Duty Tier option to match — override it up top any time.

Suggested duty tier
LD
Light Duty
Est. rear axle load
1000 kg
stock
LD MD HD XHD
This load is over the N80's rated rear axle capacity (1700kg). Talk to us before we spec a pack — a GVM upgrade might be the better fix.

Your setup has been calculated and attached to this order — we'll confirm the exact spec before we build.

Guide only. Your answers attach to your order automatically so we see them at checkout, and we'll sanity-check the spec before we build. We're chasing ride comfort and capability together — not stance for its own sake.

What's included

  • Bilstein 6112 B60 Front Coilover (2.5in big bore)
  • Bilstein Platinum Rear Shock — 630mm open
  • Rear leaf spring pack — duty tier selectable, matched to your Vehicle selection (N70 and N80 use different packs)
  • Leaf spring bush kit

Note: N70 and N80 shackles differ too — if you're supplying or reusing your own, check fitment against the Vehicle you selected above.

Optional add-on: CalOffroad Fixed Upper Control Arm Kit (2° caster) — corrects caster/camber geometry at this lift height, sold separately or bundled here at a discount off buying individually.

Prices shown are the sum of individually costed components. This is a made-to-order package — allow standard lead time for the leaf pack and 6112 to be picked and freighted together.

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