3.5" Turbo Back Exhaust System - Isuzu MU-X 3.0L 4JJ1 (2017-2021) | Outback Exhausts

Premium Turbo Back Exhaust System for Isuzu MU-X 3.0L 4JJ1 Diesel (2017-2021)

Unlock the full potential of your Isuzu MU-X with this premium 3.5-inch turbo back exhaust system, engineered specifically for the 3.0L 4JJ1 turbo diesel engine (2017-2021 models). Manufactured in Australia using premium mandrel bent stainless steel, this exhaust delivers measurable performance gains, improved fuel efficiency, and a deep, refined exhaust note.

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

Key Features & Benefits

• 3.5-inch (89mm) diameter - Optimized bore size for maximum exhaust flow and reduced backpressure
• Turbo back configuration - Complete system from turbo outlet to rear tailpipe for maximum performance gains
• Mandrel bent stainless steel construction - Maintains consistent internal diameter through bends, preventing flow restrictions
• Bolt-on fitment - Direct replacement design using factory mounting points, no cutting or welding required
• Australian engineered and manufactured - Designed for Australian driving conditions and terrain
• 5-year warranty - Comprehensive coverage for peace of mind
• Performance gains - Improved throttle response, increased power and torque output, better fuel economy
• Premium sound - Deep, refined exhaust note without excessive drone

What's Included

• Complete turbo back exhaust system (turbo outlet to tailpipe)
• All necessary gaskets (excluding turbo gasket) and hardware
• 5-year manufacturer warranty documentation

Vehicle Compatibility

Make: Isuzu
Model: MU-X
Engine: 3.0L 4JJ1 Turbo Diesel
Years: 2017, 2018, 2019, 2020, 2021
Configuration: Turbo back (replaces entire system from turbo to tailpipe)

Technical Specifications

• Pipe diameter: 3.5 inches (89mm)
• Material: Premium grade 409 stainless steel
• Construction: Mandrel bent for optimal flow
• Weight: 24kg
• Fitment type: Bolt-on, direct replacement
• Country of manufacture: Australia

Performance Benefits

This turbo back exhaust system significantly reduces exhaust backpressure, allowing your 4JJ1 turbo diesel engine to breathe more efficiently. The result is:

• Improved throttle response and acceleration
• Increased power and torque throughout the rev range
• Better fuel economy during highway cruising
• Lower exhaust gas temperatures (EGTs)
• Enhanced engine longevity due to reduced strain

Installation

This exhaust system features a bolt-on design that utilizes factory mounting points and hangers. Installation typically takes 2-3 hours for experienced mechanics. Professional installation is recommended to ensure proper fitment and optimal performance. No cutting, welding, or permanent modifications required.

Why Choose Outback Exhausts?

Outback Exhausts specializes in premium exhaust systems for 4x4 and off-road vehicles. Every system is engineered and manufactured in Australia to withstand the harshest driving conditions. We use only premium materials and mandrel bending techniques to ensure maximum performance and durability. Our 5-year warranty demonstrates our confidence in the quality and longevity of our products.

Frequently Asked Questions

Q: Will the outback exhaust fit my 2019 Isuzu MU-X 3.0L diesel?
A: Yes, this outback exhaust is designed specifically for 2017-2021 Isuzu MU-X models with the 3.0L 4JJ1 turbo diesel engine.

Q: Does the outback exhaust system include a DPF delete?
A: This outback exhaust system is a turbo back system. Please check local emissions regulations before installation.

Q: What performance gains can I expect from an Outback Exhaust?
A: Typical gains include improved throttle response, better fuel economy (especially during highway driving), and a noticeable increase in power and torque.

Q: Is professional installation required for the Outback Exhausts system?
A: While the outback exhaust is a bolt-on system, we recommend professional installation to ensure proper fitment and optimal performance.

Q: What is the warranty coverage?
A: This outback exhaust system is covered by a comprehensive 5-year manufacturer warranty against defects in materials and workmanship.

Q: Will the outback exhaust be too loud?
A: This system produces a deep, refined exhaust note that enhances the driving experience without excessive drone or cabin noise.

 

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