FAQ | Fatz Fabrication | 4WD Components & Accessories

NOTICE |  General Order time frame is 5 – 15 working days for all products. Contact us for further information.

NOTICE | General Order time frame is 5 – 15 working days for all products. Contact us for further information.


What are your snorkels built from?

All our snorkels are built from 316 Stainless steel 4” tube and quality mandrel bends. They are all ground back and finished to a seamless finish, whether we are powder coating or polishing to our desired grained finish. All mounting brackets are 3mm stainless steel and either bolted to the snorkel via our welded nutsert technique or welded directly to the snorkel.

Do you get a lot of induction noise with a stainless snorkel?

Stainless steel will resonate noise a lot more than conventional plastic snorkels. This is due to the hardness of the surface and free flowing form. This is most noticeable when the full intake is replaced all the way to the turbo or inlet. The severity of this is determined by many factors including engine type, length of intake tract, turbo fitted, etc. If this may be an issue for yourself, we do offer ramhead options for many vehicles, which still allows for a full 4” offreeflowing intakethough will not put the noise source right at the window area.

How do you plumb the snorkel to the Airbox?

100% NO convoluted tube. We use stainless steel tube and highquality silicone couplings to join all our snorkels to either the factory airbox or our Airboxes where a distance needs to be travelled through the guard. Many of our snorkel and Airbox combinations use our Diaphragm seal arrangement where the snorkel actually connects directly to the Airbox and is sealed water tight. This allows no additional couplings that may cause a leak. We design our Snorkels so the outlet is in the right location for coupling as needed. This means there is no need for flexible hoses to make up for a lack of design process.

How should I maintain my Snorkel?

Polished Snorkels: Being that the snorkels are built in 316 stainless, there is little chance for tea staining or browning of the surface. If it does happen to discolour, the snorkel can be polished using general car polish and a rag. Should this not remove the marking, a fine scotch brite pad can be used in the direction of the grain. This will dull the snorkel surface and require polishing afterwards. Keep in mind any process will change the surface appearance and need to be applied to the majority of the snorkel to blend out the treatment.

Powder coated snorkels:There is little needed on powder coated products. The snorkel can be wipedover with some inox on a rag to blend out any light scratches. It is not recommended to polish a satinfinish powder coated product, as this will turn it to gloss, which cannot be reversed. Should a deepscratch occur, the snorkel will need to be recoated to completely rectify the defect

Do I Need to get a tune after fitting a Snorkel?

No, a snorkel will have little effect on the tune of a vehicle. The intake Air still passes through the factory Air filter and mass air flow sensor which will pick up any variances in air volume from the snorkel fitment.

Do I Need to get a tune after fitting an Airbox?

No. It is not essential to have the vehicle tuned after fitting a Fatz Built Airbox. If the vehicle is a common rail diesel, the MAF sensor is heavily relied on for all engine operation and needs to read accurately. If integrating the MAF into the outlet of our boxes, which is unavoidable in most cases. We have spent many hours on the dyno with various vehicles, working out the right sizing and shape of our MAF tubes, to ensure the sensor reads accurately. This in turn will allow the engine to run as per factory and compensate for any increase in airflow. To achieve the maximum benefit from any aftermarket component, a tune is a key piece of the puzzle, though not necessary in every case.

Do I Need to get a tune after fitting a VDJ70 series intake?

Recommended, not essential. With our high flow intake for the VDJ70 series vehicles, we have the need to relocate the MAF, as the new section of pipe where the MAF was, is now 4”. This size is far from ideal to mount the MAF for general use. As such we have it mounted in a tube pressed to size, to match as close as practical, the factory MAF tube sizing. As this is very close to the factory specs, the reading will also be very similar. The vehicle is 100% drivable after fitment and without a tune. However, with the MAF being in a different location in the intake tract and the tube being marginally different from factory, it is preferred to have a competent tuner with MAF scaling ability, carry out a tune to get the best results

Do rear facing snorkels rob power?

In a very narrow range in operating circumstances, the snorkel, in rear facing configuration, may induce a negative pressure at the entry of the snorkel. If you have a very low powerednaturally aspirated vehicle, this may have a detrimental effect on drivability. For the majority of vehicles, there will be no noticeable effect on drivability or fuel economy. For turbo charged vehicles the engine is under light load state at cruising condition (100km/H) andas such the turbo is already producing boost and not in a lag state. This means that it does not have to overcome the negative pressure at the snorkel entry to increase boost and airflow when accelerating. As such there is little to no noticeable lag in throttle response or acceleration at highway speeds. Anything lower than highway speed, the lack of air velocity over the snorkel head is not sufficient to consider it causing an issue. If you want to have every gain possible in your set up, a ram head will aid to a small degree in some conditions. We do offer ram head options for some vehicle models.

Why fit an after market airbox to my 4x4?

The answer to this is different for different people. In a lot of cases the vehicles we supply for have had performance upgrades on the engine and the factory airbox is now a restriction. Replacing the airbox may allow further power to be obtained or enable the power to be achieved easier. Other vehicles come from the factory with filtration issues,where the factory air filter housing allows dust to bypass. We see this all the time when fitting out to vehicles. Some customers are really just interested in the visual appearance of our products and want to increase the aesthetic appeal of their engine bay. Others are interested in the ability to have a reusable, washable filter, that our oiled element filters provide. We also supply to customers who have done engine conversions and our airbox is better matched to the power output and/or intake location of the new engine. Whateverthe reason, our products will in all cases flow better, look better and filter better than the factory set up in your vehicle, allowing the maximum potential to be achieved when doing other modifications or having a tune applied.

What filters do you use in your Airboxes?

We have filters made to our specification in the USA. Our Fatz built Air filters are quality made filters, built with Offroad driving in mind. We have options for paper elements which have a filtration efficiency of 99.599.7% or 8 Layer gauze elements which have a filtration efficiency of 99.399.5%. We have been using these filters for many years and have carried out testing in vehicles from daily driven vehicles to offroad racing applications such as Winch truck Challenges and OffRoad Rally applications, all with great results. With option for 9” and 7” long elements, we can offer these for use in general applications as well as replacements for you Fatz built Airboxes. Flow ratings on our filters are 1180CFM maximum flow for our 8 Layer 9” pod filter. 1080CFM for our Paper element 9” element filters. The Pod design offers many advantages over OEM panel filters. With a very secure sealing design to the Airbox outlet, the filter will not cause a leak when under heavy suction in a clogged state. If the filter element is a quality material, there is no way for dust to bypass the filter under normal operating conditions.

What happens to water, drawn in the snorkel?

We are conscious that water will enter the snorkel on occasion. As suchon all of our Airboxes, we have a duck style valve in the base of the box, to allow water to drain out. In some of our newer design boxes, where space allows, we also have a water deflector plate and drain tank. The water deflector plate is designed to deflect any water being drawn in with the intake air and divert it away from the filter. This is positioned between the inlet of the box and the filter. This is designed tonot allow any water to impact the filter directly and be drawn into the engine. This deflector plate is positioned to divert water into the drain tank. This allows a large quantity of water to drain away from the main box housing and the filter. The tank then drains via the duck valve in the base of the tank.

Are your Airboxes completely sealed?

No. We design our boxes for off road use and the use that the majority of our customers would experience. If our box is fitted and plumbed correctly, the only point at which water will enter is the drain valve. The valve is designed to allow water out but not in; however, it is not a complete seal. This is preferred over a completely sealed airbox, as the majority of people do not submerge their vehicle nearly as often as they will take water in the snorkel. As such, it is much more preferable to allow water to drain than to have a sealed unit and risk the engine taking in water, drawn in the snorkel. If a sealed unit is desired, the drain valve can be replaced with a blank grommet, the box will then be sealed.

Will fitting a high flow airbox produce more power?

It depends. 
The Rule is: you will only make as much power as your most restrictive component allows. In TD42 Patrols for example. If it is fitted with an aftermarket turbo and injection pump, then comes to us for a Snorkel and Airbox package. The vehicle will produce notably more power (we have seen 20hp gains). The vehicle will rev cleaner, feel more responsive and drive nicer. This is due to the supporting mods and the fact that the Airbox was the restriction. In a modern common rail, 200 series for example. In standard trim and engine package, fitting a snorkel and Airbox package will not immediately increase power to the same extent. There will be less restriction and a larger volume of Air available to the turbos. The turbowill gain boost quicker and with less actuation. This will enable torque to come on earlier, though this may not be noticeable from the driver’s seat and may not produce a larger power figure. The ECU controls boost and fuelling. It will not necessarily allow boost levels to raise when more air is availableunless programmed to via a tune or module. The same vehicle, will however see a restriction at the factory airbox when tuned to higher boost levels. At this point fitting an Airbox will produce a noticeable difference. In all cases a freeflowing Fatz Airbox will allow the engine to breath easy and achieve the same results easier, while supplying excellent filtration. 

Note: All Information provided is generalized for providing an understanding on our products. If you would like to know specific informationabout products for your vehicle, do not hesitate in contacting us. It is the customers responsibility to make an educated decision on purchasing. We are happy to provide any information to help you in this process.