3.5" Turbo Back Exhaust System - Isuzu DMAX 3.0L 4JJ1 (2017-2020) | Outback Exhausts

Premium 3.5" Turbo Back Exhaust for Isuzu D-Max 3.0L 4JJ1 (2017 TO 8/2020)

• Note that this systems is intended for OFF road use only.
• ECU tuning will be required after installation

Transform your Isuzu D-Max with our premium 3.5-inch turbo back exhaust system, specifically engineered for the 3.0L 4JJ1-TC diesel engine (2017 to August 2020). Manufactured in Australia from high-grade stainless steel, this complete exhaust replacement delivers improved performance, enhanced fuel efficiency, and a deep, aggressive exhaust note that matches your ute's capability.

What Makes This Exhaust System Different?

• Australian Made Quality: Designed and manufactured locally for Australian conditions and heavy-duty use
• 3.5-inch mandrel bent tubing: Maximizes exhaust flow and reduces back pressure for better engine performance
• Complete turbo back system: Replaces everything from the turbo outlet to the rear tailpipe
• Premium 409 stainless steel construction: Superior corrosion resistance for long-lasting durability in harsh conditions
• 5-year warranty: Backed by our comprehensive Australian warranty
• In stock and ready to ship: Fast dispatch for quick installation

Performance Benefits You'll Notice

This exhaust system delivers measurable improvements to your D-Max's performance. Expect reduced exhaust gas temperatures (EGTs) by up to 50-80°C, improved throttle response, and potential fuel economy gains of 15-20% depending on driving conditions. The larger 3.5-inch diameter significantly reduces turbo lag and back pressure compared to the restrictive factory system, especially beneficial when towing or carrying heavy loads.

Who Is This Exhaust For?

Perfect for D-Max owners who regularly tow caravans or trailers, use their Ute for work applications, or want to maximize their vehicle's potential. Whether you're hauling equipment on job sites, towing across the country, or need reliable performance for 4x4 adventures, this exhaust handles the demands of serious Ute use.

Installation and Fitment

Professional installation is recommended. The system includes all necessary gaskets (except turbo gasket), clamps, and hardware for a complete bolt-on installation. Fits Isuzu D-Max models with the 3.0L 4JJ1-TC turbo diesel engine from 2017 to August 2020 (pre-facelift models).

Frequently Asked Questions

Does this Outback exhaust fit the 2017-2020 Isuzu D-Max 3.0L?
Yes, this outback exhaust is specifically designed for Isuzu D-Max models with the 3.0L 4JJ1-TC diesel engine from 2017 to August 2020. It does not fit the later 3.0L models from September 2020 onwards.

What is the difference between 3 inch and 3.5 inch exhaust on a D-Max?
A 3.5-inch exhaust provides approximately 35% more cross-sectional area than a 3-inch system, resulting in significantly better flow, lower EGTs (50-80°C reduction), and improved performance when towing or under load. For heavy towing, 3.5-inch is the preferred choice.

How much louder is the outback exhaust system compared to the stock D-Max exhaust?
Expect a deeper, more aggressive tone without excessive drone. The sound level is noticeably improved with a satisfying diesel rumble, but remains comfortable for daily driving and highway cruising.

Does this outback exhaust include a DPF or catalytic converter?
This outback exhaust system is a turbo back exhaust system. It does include a high flow catalytic converter.

What material is the outback exhaust made from?
Constructed from high-grade 409 stainless steel with mandrel bent tubing for maximum durability, corrosion resistance, and optimal exhaust flow.

How long does installation take?
Professional installation typically takes 2-3 hours. We recommend using a qualified exhaust specialist or 4x4/ute workshop familiar with D-Max exhaust systems.

Does this come with a warranty?
Yes, all Outback Exhaust systems include a comprehensive 5-year Australian warranty covering manufacturing defects and workmanship.

Can I install the Outback exhaust system myself?
While mechanically inclined owners can install this system with proper tools and a hoist, we recommend professional installation to ensure proper fitment, sealing, and optimal performance.

Will the Outback exhaust improve towing performance?
Yes, the increased exhaust flow reduces back pressure and EGTs, which is particularly beneficial when towing. Many customers report improved power delivery and reduced engine strain when towing heavy loads.

Is this Outback exhaust suitable for off-road use?
Absolutely. The stainless steel construction and robust design make it ideal for off-road conditions, corrugated roads, and harsh Australian terrain.

Technical Specifications

• Pipe diameter: 3.5 inches (89mm)
• Material: Stainless steel mandrel bent tubing
• Configuration: Turbo back (complete system)
• Weight: 24kg
• Fits: Isuzu D-Max 3.0L 4JJ1-TC diesel (2017 - August 2020)
• Warranty: 5 years Australian warranty
• Origin: Australian designed and manufactured
  

What's Included

Complete turbo back exhaust system with all necessary gaskets (excluding turbo gasket), and mounting hardware for installation.

DISCLAIMER: 

This product is intended strictly for off-road racing, ADF or mining vehicles, overseas models exempt from Australian Design Rules (ADR), or vehicles with valid Primary Producer exemptions [1, 2]. 

Installing this product renders the vehicle non-compliant with ADR standards; consequently, it cannot be legally operated on or off-road in Australia unless a specific exemption applies [1, 3]. It is the owner's responsibility to verify regulatory compliance and determine how this modification impacts the vehicle’s warranty and insurance coverage [2, 3]. 

1. Australian Design Rules (ADR)
2. Department of Infrastructure: Vehicle Exemptions
3. Product Liability and Safety Compliance

 

Need help choosing the right exhaust? Our team understands ute exhaust systems and can help you select the perfect setup for your D-Max. Contact us for expert advice on fitment and performance.