Everything you need to fit your CannaFab airbox, step by step. Tick things off as you go. Your progress is saved on this device.
Want it done for you? Book a professional fitting or find a recommended fitter. See our installation policy for warranty cover.
Lay everything out and tick it off before you pick up a tool. Anything missing? Contact us before you start.
Socket set and spannersRatchet, 8–13 mm sockets and spanners, for the factory mounts and baseplate bolts
ScrewdriversPhillips and flat blade, and a flat blade or driver for the hose clamps
Allen keys2.5 mm for the MAF bolts, 4 mm for the lid bolts
Trim clip toolor a small flat screwdriver, for the factory clips
Pliersfor spring clamps and hose clips
You'll also need: a clean rag, silicone spray and blue Loctite for any bolt you take out and refit.
Park on level ground and open the bonnet. Disconnect the battery's negative terminal.
Lay the kit out and check it against the list above. Keep the factory parts you take off until the install is finished: the rubber mounting feet, the MAF sensor, the mounting bolts and the breather (PCV) barb and its clamp are reused.
Find the MAF (air flow) sensor plug on the factory airbox lid or intake pipe.
Press the locking tab and pull the plug off. Pull on the plug, never the wires.
Loosen the hose clamp where the intake hose meets the airbox, and the clamp at the turbo intake pipe end.
Work the hose off both ends and lift it out. Cover the open intake with a clean rag so nothing falls in.
Undo the bolts and clips holding the airbox down, then lift it straight up. It takes a firm pull to free the rubber mounting feet.
Put it on a clean bench. You'll move the MAF sensor and the rubber feet across from it.
Undo the two screws and lift the MAF sensor out of the factory airbox.
Sit it on the CannaFab MAF housing the same way round as it was in the factory part: the airflow arrow points towards the engine. It must sit flat on its O-ring.
Fix it to the housing with the M3 bolts (2.5 mm Allen key). Snug, not tight.
Pull the rubber mounting feet out of the factory airbox.
Push them fully into the holes in the CannaFab baseplate (a dab of silicone spray helps). They locate the baseplate on the factory mounts.
Sit the baseplate on the factory airbox mounts, feet in the factory holes, with the MAF wiring routed under the plate first, not pinched.
Bolt it down with the factory bolts. Firm, not overtight.
Before the hose goes in the car, push the factory breather (PCV) barb into the new silicone hose and fit the factory clamp. It's hard to do once the hose is in.
Slide both hose clamps onto the silicone hose.
Push the hose onto the turbo intake pipe first, clamp loose. Leave it loose so the airbox can still move.
Lower the CannaFab airbox onto the baseplate so its outlet slides into the silicone hose, then push it down so its feet press into the baseplate. Feel underneath to check every foot is pressed in properly.
Check it sits level and clear of the bonnet, brake lines, wiring and anything that moves. Body lift? The silicone hose may need trimming to suit.
Open the lid and check the pod filters are seated square on the inlets with the clamps tight.
Check the lid seal sits in its groove all the way round, then fit the lid and do up the lid bolts (4 mm Allen key).
Set the drain valve on the bottom of the box: open for everyday driving, closed for water crossings.
Reconnect the factory breather (PCV) hose to the barb in the silicone hose. Check there are no kinks or tight bends.
Push the factory plug onto the MAF sensor until the lock clicks.
Check the wiring has enough slack for the engine to move, and clip it back where it was.
Tighten both hose clamps. Check the baseplate bolts and the MAF bolts.
Make sure no tools, clips or rags are left in the engine bay, then reconnect the battery.
Start the engine and let it idle. Listen for whistling or sucking noises at the silicone hose and the lid.
Check there are no warning lights. Take it for a short drive and check the clamps and bolts again afterwards.
Keeping the factory airbox? This is the short version for the BT-50 / D-Max 4" side-entry stock airbox adapter.
Take the factory airbox out (steps 2–4). Tape the cut-out template to the side wall where the snorkel hose will come in and cut the opening with a rotary tool or air saw. The 4" adapter needs the factory hole opened up to 3.5".
Fit the block-off plate over the original inlet and the side-entry adapter in the new opening. Run a continuous bead of Sikaflex (or automotive silicone) on every mating face. Let it cure before you drive or connect the snorkel hose.
Refit the airbox, connect the snorkel's 4" silicone hose to the adapter and clamp it.
Talk to the people who built it. Call 0478 594 451 (Mon–Fri, 9am–3pm) or email info@cannafab.com.au. Include a photo and your order number and we'll help you sort it.
This guide covers: Isuzu D-Max (MY20-26) Twin Pod Filter Airbox.
Guide v1.0 · updated 13 Nov 2026 · D-Max · All install guides