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.

Toyota Hilux Exhaust Upgrade Guide: Which System Suits Your Hilux?

July 13, 2026

If you own a Toyota Hilux you already know it's one of the toughest most capable 4x4s ever built. Whether you're running it as a daily driver, a tow rig or a serious off-road weapon one of the best upgrades you can make is a quality exhaust system. But with so many Hilux generations, engine codes and exhaust types out there it's easy to get lost.

This guide cuts through the noise. We'll walk you through exactly which exhaust system suits your Hilux by engine, by year and by what you're trying to achieve. Every system listed here is one we actually stock and sell at Outback Exhausts.

Why Upgrade Your Hilux Exhaust?

The factory exhaust on a Hilux is designed to meet emissions regulations and keep costs down not to maximise performance. A quality aftermarket exhaust system can deliver:

More power and torque — less backpressure means your turbo spools faster and your engine breathes better
Better fuel economy — improved exhaust flow often translates to measurable fuel savings especially on long highway runs
A deeper more aggressive exhaust note — because your Hilux should sound as tough as it looks
Improved towing performance — particularly noticeable when hauling heavy loads up long grades
Longer engine life — quality stainless steel systems resist corrosion far better than factory mild steel

Now let's find the right system for your specific Hilux.

At a Glance — Outback Exhausts Systems for the Toyota Hilux

System	Model / Series	Engine	Years	Type	Details
DPF Back Exhaust	N80 GUN126R	2.8L 1GD-FTV	2016–On	DPF Back	View System
Turbo Back Exhaust	N80 GUN126R	2.8L 1GD-FTV	2016–On	Turbo Back	View System
Turbo Back Exhaust	N70 KUN16R/25R/26R	3.0L 1KD-FTV D4D	2005–2015	Turbo Back	View System
Turbo Back Exhaust	KZN165R	3.0L 1KZ-TE	1999–2004	Turbo Back	View System
DTS Turbo Back Exhaust	LN167 / LN172	3.0L 5L-E	1997–2005	Turbo Back	View System
Exhaust with Extractor	LN167 / LN172	3.0L 5L-E	1997–2005	Full System + Extractor	View System
Extractor Only	LN167 / LN172	3.0L 5L-E	1997–2005	Extractor	View System
Dump Pipe (DTS)	LN167 / LN172	3.0L 5L-E	1997–2005	Dump Pipe Only	View System
DTS Turbo Back Exhaust	LN106 / LN107 / LN111	2.8L / 3L	1988–1997	Turbo Back	View System
Dump Pipe (DTS)	LN106 / LN107 / LN111	2.8L / 3L	1988–1997	Dump Pipe Only	View System

Toyota Hilux N80 — GUN126R 2.8L 1GD-FTV (2016–Current)

The N80 is the current generation Hilux and it's a cracker. The 2.8L 1GD-FTV diesel is a strong modern engine but it also comes with a Diesel Particulate Filter (DPF) which changes your exhaust upgrade options compared to older models.

What is a DPF and why does it matter?

The DPF is an emissions device that captures soot particles from your exhaust. It's a legal requirement on modern vehicles in Australia and removing it is not road-legal. This means your exhaust upgrade needs to work with the DPF not around it.

Which exhaust suits the N80 Hilux?

Option 1 — DPF Back Exhaust (most popular)
This system replaces everything from the outlet of your DPF back to the tip. It's the most straightforward upgrade no tuning required, no compliance issues and you'll still notice a solid improvement in flow and sound.

3" and 3.5" DPF Back Exhaust — Toyota Hilux N80 GUN126R 2.8L 1GD-FTV (2016–On)

Option 2 — Turbo Back Exhaust (maximum performance)
This system runs from the turbo outlet all the way to the tip replacing the factory DPF with a high-flow DPF. It's the full performance upgrade better flow, better sound and more power gains. Note this setup removes the DPF and is intended for off-road, racing, mining and not legal for road use in Australia without a specific exemption. It requires a tune.

3" and 3.5" Turbo Back Exhaust — Toyota Hilux N80 GUN126R 2.8L 1GD-FTV (2016–On)

You can also pair either system with our 4" Stainless Steel Snorkel for the N80 Hilux for a complete intake and exhaust upgrade.

Toyota Hilux N70 — KUN16R / KUN25R / KUN26R 3.0L 1KD-FTV D4D (2005–2015)

The N70 generation is one of the most popular Hilux models on Australian roads and for good reason. The 3.0L 1KD-FTV D4D diesel is a proven and tuneable engine that responds brilliantly to exhaust upgrades. Best of all this generation doesn't have a DPF so you have more flexibility.

Which exhaust suits the N70 Hilux?

Turbo Back Exhaust — the go to upgrade
Running from the turbo outlet to the tip this is the most popular upgrade for the N70. You'll feel the difference immediately stronger mid range pull better throttle response and a noticeably deeper exhaust note.

Turbo Back Exhaust — Toyota Hilux N70 3.0L 1KD-FTV (2005–2015)

Pair it with Outback Exhausts' 4" Stainless Steel Snorkel for the N70 to maximise both intake and exhaust flow a popular combo for touring and towing builds.

Toyota Hilux KZN165R — 3.0L 1KZ-TE Diesel (1999–2004)

The KZN165R is a solid dependable workhorse. The 1KZ-TE engine has a well earned reputation for reliability and a turbo back exhaust is one of the best bang for buck upgrades you can do on this platform.

Which exhaust suits the KZN165R Hilux?

Turbo-Back Exhaust
A full turbo-back system on the KZN165R delivers noticeably improved throttle response and a stronger pull through the rev range. If you're towing or touring this is a worthwhile investment.

Turbo Back Exhaust — Toyota Hilux KZN165R 3.0L 1KZ-TE (1999–2004)

Toyota Hilux LN167 / LN172 — 3.0L 5L-E Diesel (1997–2005)

The LN167 and LN172 are the naturally aspirated diesel workhorses of the Hilux lineup. These engines respond well to exhaust upgrades and Outback Exhausts' offer a full range of systems for this platform from complete turbo back kits to individual components.

Which exhaust suits the LN167 / LN172 Hilux?

Option 1 — DTS Turbo Back Exhaust (full system)
Outback Exhausts' most comprehensive upgrade for this platform. The DTS (Diesel Turbo System) turbo back exhaust replaces the entire exhaust from the turbo outlet to the tip for maximum flow gains.

DTS Turbo Back Exhaust — Toyota Hilux LN167/172 3.0L 5L-E (1997–2005)

Option 2 — Exhaust with Extractor
A great option if you want improved scavenging and flow through the headers as well as the exhaust. The extractor helps the engine breathe more efficiently at lower RPM ideal for towing and off road use.

Exhaust with Extractor — Toyota Hilux LN167/172 3.0L 5L-E (1997–2005)

Option 3 — Extractor Only (Australian Made)
If you already have a good exhaust system and just want to upgrade the headers Outback Exhausts Australian made extractor is the piece you need.

Extractor — Toyota Hilux LN167 3.0L 5L-E (1997–2005) | Australian Made

Toyota Hilux LN106 / LN107 / LN111 — 2.8L / 3L Diesel (1988–1997)

The classic Hilux. These old school workhorses are still out there doing serious work and we haven't forgotten about them. If you're running one of these and want to squeeze more out of it Outback Exhausts' have exhaust solutions for you too.

Which exhaust suits the LN106 / LN107 / LN111 Hilux?

Option 1 — DTS Turbo Back Exhaust
A full turbo back system for the classic Hilux platform. Solid gains in flow and performance for a truck that was built to last.

DTS Turbo Back Exhaust — Toyota Hilux LN106/107/111 2.8L/3L (1988–1997)

Frequently Asked Questions

Do I need a tune after fitting a new exhaust?

For a DPF-Back exhaust on the N80 no tune is required. For a Turbo-Back system (especially on the N80 with a high-flow DPF) a tune is strongly recommended to get the most out of the upgrade and ensure everything runs correctly.

What's the difference between a Turbo-Back and a DPF-Back exhaust?

A Turbo-Back exhaust replaces everything from the turbo outlet to the tip. It's the most comprehensive system and delivers the biggest performance gains. A DPF-Back exhaust starts from the outlet of the DPF and replaces everything from there to the tip.

Are your exhaust systems Australian made?

Yes, our systems are Australian made including our extractors for the LN167 platform. We're proud to support local manufacturing and build systems that are engineered specifically for Australian conditions.

Can I fit a Hilux exhaust myself?

If you're mechanically confident and have access to a hoist many of our systems are DIY-friendly. That said we always recommend having your exhaust fitted by a qualified mechanic or exhaust specialist to ensure correct fitment and avoid any leaks.

Do you ship Australia-wide?

Yes we ship to all states and territories across Australia. Most metro areas receive their order within 2–5 business days.

We also ship to international destinations. If you're ordering from overseas, please call or get in touch with us to confirm shipping options and freight costs.

Not Sure Which System Is Right for You?

If you're still not 100% sure which exhaust suits your Hilux we're happy to help. We know these vehicles inside out and we'd rather you get the right part the first time than have to deal with returns or fitment headaches.

Browse the full Toyota Hilux Exhaust Systems range →

Or reach out to us directly we're a small Australian team and we actually answer our messages.

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