The 3.5″ Outback Exhaust System for the Isuzu MU-X 3.0L 4JJ1 (2017-2021 DPF back) is a bolt-on stainless steel performance exhaust that enhances flow, sound and reliability.
The 3.5″ Outback Exhaust System to suit Isuzu MU-X 3.0L 4JJ1 2017–2021 (DPF Back) is engineered for improved flow, durability and sound while maintaining a straightforward bolt-on fitment. Built in Australia using high-quality 409 stainless steel and mandrel-bent tubing, this system delivers increased throttle response, improved exhaust tone and long-term reliability for touring, towing and daily driving.
This upgrade replaces the factory DPF-back section and mounts directly to the vehicle’s existing hangers, ensuring a simple installation without modification. Owners will benefit from reduced restriction, better heat management and tougher construction suitable for harsh off-road conditions.
Key Features
Australian-made 409 stainless steel construction for strength and corrosion resistance.
3.5″ mandrel-bent pipework designed to optimise exhaust gas flow.
Direct bolt-on fitment using factory mounting points.
Available with resonator or pipe-only configuration for preferred sound level.
Includes all required clamps, hangers and hardware.
Backed by a 5-year manufacturer warranty.
Specifications
Vehicle Make: Isuzu
Model: MU-X (Wagon, 4WD only)
Engine: 3.0L Diesel 4JJ1, turbocharged
Year Range: 2017–2021
System Type: 3.5″ DPF Back Exhaust
Material: 409 stainless steel
SKU: OE1694-35
What’s in the Box
Front connecting pipe
Centre resonator or straight pipe section (depending on selected option)
Rear tailpipe section
Mounting hardware and clamps
Compatibility
This exhaust system is designed specifically for the Isuzu MU-X 3.0L 4JJ1 engine (2017–2021 wagon 4WD models). It is not suitable for other MU-X variants or earlier engine configurations.
Delivery & Lead Times
Outback Exhaust Systems are stocked and shipped Australia-wide. Delivery times vary by location, and some remote areas may require depot collection. Dispatch typically occurs within standard business timeframes. Please contact us for current stock availability or freight requirements.
Professional Fitting Service on the Sunshine Coast
Sunshine Coast Diesel Tuning offers professional installation for all performance exhaust systems. Our team provides expert fitment, diagnostics and setup to ensure your Isuzu MU-X performs at its best. Visit us here: Sunshine Coast Diesel Tuning
