Southwest Heavy Diesels

10/08/2026

KENWORTH T659 MIDLIFE

Lots of brand spanking new goodies ready for another 1,500,000 kms!

Done right, the first time

26/07/2026

The real test isn't the dyno.

Any bloke can tune a rig to make a big number for 15 seconds in a controlled room with massive fans on it.

But that doesn't mean a thing when you're stuck in stop-start traffic, pulling a heavy van up a massive hill on a 40-degree day.

The road is the actual test.

If your tune and your transmission logic fall apart the second you put real-world load on them, the setup is useless.

We pour our experience into products for the actual conditions you drive in, not just the printout.

29/06/2026

Toyota Landcruiser HJ47 12ht & 5 speed conversion completed

- Brand new genuine 5 speed transmission & transfer case with modified output

- Custom balanced driveshafts

- Mckinnon’s Cruisers crossmember

- Whistle n Soot 3.5” stainless exhaust system

And all the hidden components operating & driving like it were from the factory!

28/06/2026

Toyota Landcruiser HJ47 12ht & 5 speed conversion completed

- Brand new genuine 5 speed transmission & transfer case with modified output

- Custom balanced driveshafts

- Mckinnon's Cruisers crossmember

- Whistle n Soot 3.5" stainless exhaust system

And all the hidden components operating & driving like it were from the factory!

18/06/2026

21/05/2026

A trip over east to do a lot of r&d for the Boostec ecu your 4x4 needs.
In this video, we cover a DIY install on a readily available NOS system.

Check it out 🔥🍻

Big thanks to

Chris from Boostec
Baldur from Baldur Control Systems
Dale @ Performance 4x4
And Chris from Energetic Motorsports

This is a long form video some guys have asked for.Nitrous instal...

07/02/2026

Now stocking selected Amaron and Bosch battery’s for your 4wd, truck and machine!

Get in store for a quality battery!

07/02/2026

Own a Toyota with a s**t handbrake? 🫨

Pop in n say G’day @ 100 Strelly Street Busselton
or give us a call on 0409606765

We use nothing but the best, genuine and upgraded parts for even the simple things!

03/02/2026

This is just an example of what we get to see in the shop, you have to wonder, how exactly did they get away with this and not lose a wheel.
The vehicle got a brand new front & rear differential, rear axle housing and complete front & rear overhaul including


- CV axle shafts
- Spindles
- High performance bearings and seals
- Slotted & dimpled rotors
- Hand brake assy with upgraded struts
- Hubs

And a lot more, bringing the vehicle back to its former glory, with a safe and reliable outcome!