What is the best exhaust for Isuzu D-MAX?

A DPF-back exhaust is the best option for most Isuzu D-MAX owners because it improves airflow, enhances sound, and remains compatible with factory emissions systems. For higher performance, a 3.5 inch exhaust system offers better airflow and increased efficiency.

What is better for Isuzu D-MAX: a 3 inch or 3.5 inch exhaust?

A 3 inch exhaust is ideal for daily driving, fuel efficiency, and balanced performance. A 3.5 inch exhaust system is better for towing, modified vehicles, and improved airflow.

Does upgrading the Isuzu D-MAX exhaust increase power?

Yes, upgrading the exhaust improves airflow and reduces back pressure, which can increase power and throttle response. The gains are more noticeable when combined with ECU tuning.

Does a D-MAX exhaust upgrade improve fuel efficiency?

Yes, improved airflow reduces engine strain, which can lead to better fuel efficiency, especially during long-distance driving.

What is a DPF-back exhaust for Isuzu D-MAX?

A DPF-back exhaust replaces the piping after the Diesel Particulate Filter. It improves airflow and sound while maintaining compliance with emissions systems.

Is upgrading the Isuzu D-MAX exhaust safe for long-term use?

Yes, a properly installed exhaust system designed for the Isuzu D-MAX is safe for long-term use and can improve engine efficiency and performance.

Does exhaust size affect performance in Isuzu D-MAX?

Yes, larger exhaust systems like a 3.5 inch exhaust allow better airflow and reduced back pressure, which improves performance, especially in modified or tuned vehicles.

Will a bigger exhaust make the Isuzu D-MAX louder?

Yes, a larger exhaust system produces a deeper and more noticeable sound compared to the stock exhaust, especially with performance-focused setups.

Best Exhaust for 79 Series LandCruiser: DPF Back, Turbo Back, 3", 3.5" & 4" Guide

April 20, 2026

Upgrading your 79 Series LandCruiser exhaust is one of the most effective modifications you can make — improving performance, reducing EGTs, and enhancing your driving experience whether you're towing, touring, or off-road.

Types of Exhaust Systems for 79 Series LandCruiser

DPF Back Exhaust- Best for 79 Series Models with a DPF

A DPF back exhaust replaces piping from the DPF outlet to the tailpipe. It retains the factory DPF, keeping your 79 Series ADR compliant. Benefits include reduced back pressure, improved throttle response, deeper exhaust note, and straightforward bolt-on installation.

Turbo Back Exhaust- Best for 79 Series Models without a DPF

A turbo back exhaust replaces the full system from the turbocharger outlet to the tailpipe. It delivers maximum power gains, faster turbo spool, substantially lower EGTs, and an aggressive exhaust note. Best suited to older 79 Series models without a DPF or dedicated performance builds.

3 Inch vs 3.5 Inch vs 4 Inch — Which Size is Right?

3 Inch: Balanced performance and efficiency. Ideal for daily driving, highway touring, and light towing. Deep, refined exhaust note.

3.5 Inch: Greater airflow and reduced back pressure. Better for moderate towing and performance builds. Deeper, more aggressive note with headroom for future modifications.

4 Inch: Maximum airflow. Best suited to heavily tuned engines and extreme towing setups. Loudest option. Can feel excessive for everyday use.

Benefits of Upgrading Your 79 Series Exhaust

Improved throttle response and acceleration
Reduced EGTs under load
Better towing performance and fuel economy
Deeper, more purposeful exhaust note
5–15% improvement in performance output

Why Outback Exhausts?

Australian made from 409 stainless steel. ADR compliant. 5 year warranty. Precision mandrel bent pipework. Bolt on fitment. Fast Shipping

Which Exhaust is Best for the 79 Series LandCruiser?

For the vast majority of 79 Series owners daily drivers, tourers, and those who tow regularly a 3 inch or 3.5 inch exhaust is the best choice. These sizes deliver the ideal balance of performance, fuel efficiency, and exhaust note without being excessive. A 3 inch suits everyday use and light towing, while a 3.5 inch is the better pick if you tow frequently or plan to tune. The 4 inch is best reserved for heavily modified or race-focused builds where maximum airflow is the priority.

Frequently Asked Questions

What is the best exhaust for a 79 Series LandCruiser?

A 3 inch or 3.5 inch DPF back exhaust is the best choice for most 79 Series owners. It delivers the right balance of performance, compliance, and sound. A turbo back exhaust suits older models without a DPF.

What is a DPF back exhaust?

It replaces piping from the DPF outlet to the tailpipe, retaining the factory DPF for ADR compliance while improving performance and sound.

What is a turbo back exhaust?

It replaces the full exhaust from the turbo outlet to the tailpipe. Best for older 79 Series models without a DPF or dedicated performance builds.

Is a 4 inch exhaust worth it for the 79 Series?

Only for heavily tuned or extreme towing setups. For most drivers, a 3 inch or 3.5 inch exhaust delivers better real world results without being overly loud.

Will it increase power?

Yes. Reduced back pressure improves airflow, delivering 5–15% more power. Best results when combined with an ECU tune.

What material are Outback Exhausts systems made from?

All Outback Exhausts systems are constructed from premium 409 stainless steel, chosen for its superior resistance to corrosion, heat, and the harsh conditions of Australian off-road driving.

Do Outback Exhausts systems come with a warranty?

Yes. All Outback Exhausts systems are backed by a 5-year warranty, reflecting our confidence in the quality of Australian-made manufacturing and the durability of our materials.

Does it reduce EGTs?

Yes. Improved exhaust flow lowers EGTs. Especially important when towing or driving under load.

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