We offer telephone support.

Our tuning boxes also do not have to be TUV approved like many competitor units manufactured in Germany, resulting in a significant cost saving which can be passed on to you, the customer.

Every unit is individually tested to tight specifications.  We test units on a wide variety of vehicles and have developed and rigorously tested every unit we sell for the application it was designed for.

Our tuning boxes are designed to give smooth, useable power increases.They don’t cause the car to pour smoke, go into limp home mode, or overstress the engine to the point at which you risk damaging components. The default map provided on our tuning boxes increases torque without increasing maximum fuel pressure, protecting your fuel system from additional wear.

We provide detailed fitting instructions for every application we sell a product for: When comparing us with our competitors ask yourself this: If they claim to have tested their system on a variety of cars, why have they installation instructions for only a few vehicles? We promise you that dyno testing is much harder work than taking a few photos…

All of our products carry a 28 day money back guarantee, so you can purchase with confidence knowing that if our products do not perform to your liking, then you can send them straight back for a full refund.

You may ask why our products are so reasonably priced? The real question should be why are the other options so expensive?

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SW Diesel
Average rating:  
 109 reviews
by James on SW Diesel
SW diesel

Great product .

Bought this chip for my 2011 hilux from Steve at the camping and caravan super show .

5 min instillation . Great chip , plenty more power now

by Pete on SW Diesel

Bought this to try on my 18 Amarok but it was going in for a service so I thought I would try it on my wife’s 20 Touareg. SHE WONT GIVE IT BACK! What a change😁 a few problems fitting it myself but a quick call to Steve all sorted. I’m coming to buy another one mate.

by Brett Pavlou on SW Diesel

Thanks Steve very good product good service and it is nice to deal with a tradesman who knows what he is doing the all round performance changed my v6 550 to a different Ute Thanks Brett

by Jandon Middlin on SW Diesel
8 year long road test - Pajero 3.2D

Met Steve at Melbourne Caravan show 2013, bought and installed unit and have since travelled 275,000 kms all over Australia towing my OB caravan or rally car & trailer. The SW tuning box has make overtaking or simply cruising along an absolute pleasure. Optimizing power delivery and therefore economy for a minimal initial outlay - this is the very best add on you can make to your vehicle. Thank you Steve.

by Tony Johnson on SW Diesel
So happy i bought another one!!

I bought a unit for my discovery 4 and the difference is superb, as if i drive normally i get improved fuel economy, and if I want to put my foot down it is amazingly quick for a 2.7 tonne car, averaging 12.5L/100 towing the caravan.

So i bought another for the freelander 2 SD4, which again is amazing, and over 50,000km is averaging less than 8L/100km.

Really happy with the saving and added performance, plus great customer service, when I've had questions.

by Tim on SW Diesel
Defender 110

Wow, my defender does not drive like a tractor anymore, lots more power and so much smoother

by Phil Poole on SW Diesel
Prado 2.8

Purchased at show some 12 + months ago. Great product. Easy to fit. Car performs and drives better and my fuel consumption has gone down. Had a recent problem with error codes due to wiring loom. Steve was very helpful in assisting with a resolution.

by Steve B on SW Diesel
Sw chip

SW Diesel chip was installed by Steve on my Q7 4.2lt twin turbo 3 months ago.

I can say the difference was suprising, turbo lag gone, acceleration and responce instant, power increase is great, fuel economy is about the same around town as I am having to much fun. Have yet to do a country run.

The only isdue has been on 4 occasions while in 2nd, I have gone to accelerate and the engine has just not responded, like its flooded for a few seconds, then it zll comes good. I would curious to see what it is like set at a higher setting.

by Dan Hansel on SW Diesel
Sw diesel chips

Met and spoke to Steve at Sydney 4x4 show, he took the time to listen and answer all of my questions which I appreciated greatly as I could see how busy he was doing the same for many at his stall. Fitted the module and harness as per directions, which was very simple and off for a test run, WOW! My Pajero’s torque on acceleration is significantly improved but also how smooth it was throughout the rev range in each gear. Steve is a man who knows his diesels, backs his product, the simplicity of the install and cost is 100% why I purchased this. Unlike other chips which most have the added expense of fitting and wasting of your time and money dyno tuning to get similar results?. Thanks Steve you have one happy customer.

by Phillip on SW Diesel
Kia sportage my 18

Steve is great. Was very skeptical at first. After reassurance and a 28 day return policy. So I bought it. Had the chip in the Sportage for a year. Great performance over stock. A lot smoother to drive and makes it more to drive especially on open roads

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