Exhaust Systems

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At Just Autos we can supply a wide range of exhausts systems for a wide range of vehicles, All stainless exhausts consist of high grade 409 stainless and come in a wide range of configuration varying from 2.5” all the way to 4”. All systems come with high flow catalytic converters and can come with high flow mufflers or smaller resonators depending on desired exhaust note and application.

At Just Autos we can supply and fit a large range of custom exhaust systems and tail pipes.

– Why do we fit aftermarket exhaust systems?

We fit it aftermarket to improve flow of the gasses expelled from the turbocharger assembly when tuning, running higher boost pressures and increased fuelling will increase temperatures inside the exhaust manifold & turbocharger assembly, having a larger free-flowing system of exhaust will help in aiding the removal of this extra heat when tuning a diesel vehicle

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– Why exhausts can be important to custom performance tunes

When tuning a wide majority of vehicles an aftermarket exhaust is required to tune the vehicle efficiently, the factory system of exhaust has restrictive mufflers and bends which can decrease the exhaust flow and restrict the amount of torque and power we can achieve efficiently

– Do I need to remap my vehicle after and exhaust upgrade

Most common rail vehicles require to be tuned once having an aftermarket exhaust fitted to fully utilise the gains that can be achieved, in some cases when fitting an aftermarket exhaust you can have issues with sending your vehicle into limp mode caused by a freeing flowing exhaust which causes the turbo to spike above your factory ECU’s desired boost limit

– Will an exhaust upgrade improve my power without doing anything else

An exhaust alone will achieve a small % gain in torque and power but when coupled with a Just Autos custom ECU remap you can expect a sizeably % gain over factory

– How much more power and torque will an exhaust upgrade give me

Depending on the model of vehicle most exhaust upgrades alone can see up to a 5% increase in power & torque

– Is a bigger exhaust always better

Bigger is not always better contrary to popular beliefs, in some cases we have seen the factory exhaust more suited for a factory application when tuning! For example, the 3.0l Hilux is factory form is much better off with the factory exhaust but when replacing turbos will see a far better results, it all depends on style of turbo, size of engine, your desired result as to whether an exhaust is required.

– What makes a great exhaust system

Many factors come into play when it comes to making a great system of exhaust, high flow mufflers and mandrel bends will help with exhaust flow, 409 stainless exhaust will help with overcoming rust holes developing in your exhaust system and is a very pliable metal that accommodates the extreme change in temperature seen in it. This prevents cracking.

– Will my exhaust dis-colour?

Most systems of exhaust will discolour over time, some will even develop surface rust. We recommend washing the full under carriage of your vehicle down regularly to prevent surface rust developing and getting the best life out of your exhaust system.

– 3” or 4”?????

The 79 series Landcruiser exhaust can come in many sizes but 3” or 4” are the most popular systems, saying that 3” and 4” will still see the same results for power when using a factory turbo but will produce vastly different sounds when under load. When fitting an upgraded turbo from G Turbo a 4” exhaust is required to be port matched with the rear exhaust outlet of most G turbos

– Exhaust note and sound options

At Just Autos we can supply a wide array of exhaust systems to cater for sounds requirement and desired note from the vehicle, most system fitted at Just Autos are supplied with a high flow catalytic converter and muffler from standard to achieve an efficient exhaust flow while still retaining a mild note when needed but with minimal drone

– Stainless quality/grade

All our systems as in the pipe work are made out of a 409-grade exhaust grade stainless steel. This a very pliable metal that accommodates the extreme change in temperature seen in systems of exhaust. This prevents cracking.

The muffler casings are a 304-grade stainless steel. Internal perforated tube is stainless steel with a stainless-steel wool wrapped around the perforated tube to protect the fibreglass packing in the muffler.

– What’s better aluminised or stainless-steel exhaust?

Stainless steel exhausts will provide a longer lasting exhaust system while also preventing the system from rusting out over a long period of time, we recommend fitting a stainless exhaust system when touring to prevent failure while out and about

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– Do diesels need mufflers?

Most diesel vehicles require mufflers to comply to ADR standard

– How much does a cat back exhaust cost?

Cat back exhaust are quite cheap because they leave the restrictive factory catalytic converter and dump pipe in place but replace the rest of the system, re recommend replacing the exhaust from the turbo back to achieve a more efficient exhaust flow.

– Will the stainless discolour and can I clean it?

Stainless exhaust can discolour and develop surface rust over time, we recommend cleaning down your exhaust regularly to prevent this from happening however if this does occur a good quality metal polish and stainless-steel wool will clean this right up

Key Features:

• – 10-year warranty (stainless steel) 2-year warranty (aluminised steel)
• – 409 grade exhaust grade stainless steel
• – Dyno-proven power and torque increases when coupled with a custom ECU remap
• – Extremely durable and suited to off-road driving
• – Easy bolt-on system using original mounting points
• – All mandrel bends hence no restrictions
• – Built for off-road, high-clearance driving