3.5" DPF Back Exhaust System - Isuzu MU-X 3.0L 4JJ3 (2021-On) | Outback Exhausts

Premium DPF Back Exhaust System for Isuzu MU-X 3.0L 4JJ3 Diesel (2021-ONWARDS)

Maximize the performance of your latest generation Isuzu MU-X with this premium 3.5-inch DPF back exhaust system, precision-engineered for the 3.0L 4JJ3 turbo diesel engine (2021 onwards). Manufactured in Australia using premium 409 grade mandrel bent stainless steel, this exhaust delivers significant performance improvements, enhanced fuel efficiency, and a refined exhaust tone that complements your vehicle's premium character.

Key Features & Benefits

• 3.5-inch (89mm) diameter - Optimized tube size for maximum exhaust flow and minimal backpressure on the 4JJ3-TCX engine
• DPF back configuration - Complete system after DPF to rear tailpipe for maximum performance gains
• Mandrel bent stainless steel construction - Maintains consistent internal diameter through all bends, eliminating flow restrictions
• Bolt-on fitment - Direct replacement design using factory mounting points, no cutting or welding required
• Australian engineered and manufactured - Designed specifically for Australian driving conditions and terrain
• 5-year warranty - Comprehensive coverage demonstrating our confidence in quality and durability
• Performance gains - Improved throttle response, increased power and torque output, enhanced fuel economy
• Premium sound - Deep, refined exhaust note without excessive drone or cabin intrusion
• Corrosion resistant - Premium stainless steel construction withstands harsh Australian conditions

What's Included

• Complete DPF back exhaust system 
• All necessary gaskets (excluding turbo gasket) and hardware for installation
• 5-year manufacturer warranty

Vehicle Compatibility

Make: Isuzu
Model: MU-X (Latest Generation)
Engine: 3.0L 4JJ3-TCX Turbo Diesel
Configuration: Turbo back (replaces entire system from turbo to tailpipe)

Note: This system is specifically designed for the 2021+ Isuzu MU-X with the 4JJ3-TCX engine. For 2017-2021 models with the 4JJ1 engine, please see our alternative listing.

Technical Specifications

• Tube diameter: 3.5 inches (89mm)
• Material: Premium grade 409 stainless steel
• Construction: Mandrel bent for optimal flow characteristics
• Weight: 22kg
• Fitment type: Bolt-on, direct replacement
• Country of manufacture: Australia
• Warranty: 5 years

Performance Benefits

This turbo back exhaust system dramatically reduces exhaust backpressure, allowing your 4JJ3-TCX turbo diesel engine to operate more efficiently. The larger 3.5-inch diameter and mandrel bent construction ensure smooth, unrestricted exhaust flow. Benefits include:

• Improved throttle response - More immediate power delivery when you press the accelerator
• Increased power and torque - Noticeable gains throughout the entire rev range
• Better fuel economy - Especially during highway cruising and towing
• Lower exhaust gas temperatures (EGTs) - Reduced thermal stress on engine components
• Enhanced engine longevity - Less strain on turbocharger and engine internals
• Improved towing capability - Better performance when hauling heavy loads or caravans

Installation

This exhaust system features a bolt-on design that utilizes factory mounting points and hangers for straightforward installation. The system is designed to fit perfectly without any cutting, welding, or permanent modifications to your vehicle. Installation typically takes 1-2 hours for experienced mechanics. Professional installation is recommended to ensure proper fitment, optimal performance, and warranty compliance.

Sound Characteristics

This exhaust produces a deep, refined note that enhances the driving experience without being intrusive. You'll enjoy a more purposeful sound under acceleration while maintaining comfortable cabin noise levels during cruising. The system is engineered to eliminate annoying drone frequencies, making it ideal for daily driving and long-distance touring.

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 our country can offer. We use only premium materials and mandrel bending techniques to ensure maximum performance, durability, and longevity. Our 5-year warranty demonstrates our confidence in the quality of our products and our commitment to customer satisfaction.

Frequently Asked Questions

Q: Will the outback exhaust fit my 2023 Isuzu MU-X 3.0L diesel?
A: Yes, this outback exhaust is designed specifically for 2021-2025 Isuzu MU-X models with the 3.0L 4JJ3-TCX turbo diesel engine.

Q: What's the difference between this and the 4JJ1 exhaust?
A: This system is designed for the newer 4JJ3-TCX engine (2021+), while our other listing suits the earlier 4JJ1 engine (2017-2021). They are not interchangeable due to different engine configurations.

Q: What performance gains can I expect from an Outback Exhaust?
A: Typical gains include noticeably improved throttle response, better fuel economy (especially during highway driving and towing), and measurable increases in power and torque output throughout the rev range.

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

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. It's designed for daily driving comfort while providing a more engaging sound under acceleration.

Q: Can I fit this myself?
A: If you have mechanical experience and the proper tools, installation is straightforward as it's a bolt-on system. However, professional installation is recommended for the best results.

Q: Will the outback exhaust improve my towing performance?
A: Yes, the reduced backpressure and improved exhaust flow will enhance your vehicle's towing capability, providing better power delivery and improved fuel economy when hauling heavy loads.