Thread: modified/upgrade/performance air filter box

Looks like someone has finally done an aftermarket air box.

shame there is not a lot of detail thought. More on the 3 inch snorkel to go with it.

DISCOVERY 2 STAINLESS STEEL 3" RAISED AIR INTAKE WITH AIRBOX | Dirt Monkey Offroad

maybe some of the UK Bretheran could investigate and get back to the forum.

Originally Posted by 4runnernomore

Looks like someone has finally done an aftermarket air box.

shame there is not a lot of detail thought. More on the 3 inch snorkel to go with it.

DISCOVERY 2 STAINLESS STEEL 3" RAISED AIR INTAKE WITH AIRBOX | Dirt Monkey Offroad

maybe some of the UK Bretheran could investigate and get back to the forum.

Well just finished off the Alternator and I was explaining to my BIL what I am intending to do with the just ordered GU AIRBOX which should arrive this week.

Got home and as per the request from the Mandrel bending firm, as to what I need in terms of the bends of the 4" pipe. Not having the drawing tools, so I got out the cheap snorkel and took pics with the measurements

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The airbox as we see will sit a little higher on a levelled out piece of sheet metal to 'flatten' the rise towards the rear - this may enable me to have an almost straight through turbo to intercooler piping rather than the down and up that all discovery's have, as the Darkside Manifold and turbo has the outlet in a different position to standard.

Not sure with the Dirtmonkey one whether 3" is actually large enough for a snorkel or at least my requirements.

Originally Posted by 4runnernomore

Looks like someone has finally done an aftermarket air box.

shame there is not a lot of detail thought. More on the 3 inch snorkel to go with it.

DISCOVERY 2 STAINLESS STEEL 3" RAISED AIR INTAKE WITH AIRBOX | Dirt Monkey Offroad

maybe some of the UK Bretheran could investigate and get back to the forum.

Bloody conical filter design though!

Essentially useless as a filter, will just dust the motor.

The GU one RRT is looking to use will at least filter correctly.

Originally Posted by Tombie

Bloody conical filter design though!

Essentially useless as a filter, will just dust the motor.

The GU one RRT is looking to use will at least filter correctly.

Tombie. What do you mean by conical filter?

Without seeing inside the air filter box how do you know that it would dust the motor?

Originally Posted by d2dave

Tombie. What do you mean by conical filter?

Without seeing inside the air filter box how do you know that it would dust the motor?

The webpage says:

Genuine RAM-AIR 3" cone filter

I'm not convinced by them either.

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Must say have never really understood why they use the RAM style filters, especially on 4WD's, the reducing diameter is also reducing the corresponding area of filtering of the incoming air.

Suppose it could also be argued that the flat rectangle of the D2 filters offers more surface area but of course the sealing of the box is more problematic so any benefit is compromised.

Originally Posted by RRT

Must say have never really understood why they use the RAM style filters, especially on 4WD's, the reducing diameter is also reducing the corresponding area of filtering of the incoming air.

Suppose it could also be argued that the flat rectangle of the D2 filters offers more surface area but of course the sealing of the box is more problematic so any benefit is compromised.

This was one a fabricated for my Supercharged D1

Uses a late model GT element after testing flow rates.

Good for 300kw at the tyres

Originally Posted by Tombie

This was one a fabricated for my Supercharged D1

Uses a late model GT element after testing flow rates.

Good for 300kw at the tyres

HOON!!!! That is gorgeous Tombie, really really impressive, maybe should have kept my D1 V8, of course, the fuel consumption may be a bit higher again, but Whoa..





So got the GU Air Cleaner today and am exited somewhat.

The air filter is 22cm around and 11.5 cm depth, so the square is effectively a 22 * 11.5 * 2 (thickness)cm versus the Mahn filter at 21 * 8 * 5cm . The Mahle Filter has a hell of a lot more pleats I would add but this one is a reusable washable cotton filter, will investigate the throwaway ones as to their construction.

So in comparison, it was evident how short the GU box is in comparison between the two side by side, but the actual size (when comparing a circle to a rectangle of course) are pretty equal and as noted the air cleaning areas are comparable as well.


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The section to mount the box will be a shape such as this one below to allow for the shape of the front section of the engine bay with tech screws to mount the plate to the floor. The height will be as high as possible to hopefully allow me to direct line the intercooler to turbo hosing .

There are a multitude of holes on the base of the air cleaner to mount the box to the plate.

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