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

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Overview

The 3.5″ Outback Exhaust ISUZU MU-X system delivers a premium DPF back upgrade for the 3.0L 4JJ3 turbo diesel from October 2021 onward. Outback Exhaust manufactures this system in Australia using durable 409 stainless steel, ensuring strong performance in touring, towing and off-road conditions. The smooth mandrel-bent tubing improves gas flow, while the true bolt-on layout aligns directly with the factory mounting points for a clean and efficient installation.

This 3.5″ DPF back system fits ISUZU MU-X 4WD models and arrives with all components required for installation. You can choose a resonator for a balanced, medium exhaust note or select the pipe-only version for a louder, more aggressive sound. The design supports reliable daily driving and demanding long-distance use.

Key Features

• 3.5″ (approx. 89 mm) DPF back exhaust system built specifically for the ISUZU MU-X 3.0L 4JJ3.
• Australian-made construction using 409 stainless steel, a proven OEM-grade material.
• Mandrel-bent tubing enhances gas flow and produces a clean, consistent exhaust note.
• Bolt-on layout aligns with factory mounting points for fast, uncomplicated installation.
• Suits all ISUZU MU-X 4WD models from 10/2021 onward.
• Available with a resonator (medium note) or as a pipe-only setup (loud note).
• Includes fasteners and gaskets; turbo gaskets are reused during installation.
• Comes with a 5-year exhaust system warranty and a 2-year extractor warranty where applicable.
• Worldwide shipping available, including options for remote and international locations.

Specifications

• Product: 3.5″ Outback Exhaust ISUZU MU-X DPF Back System
• Vehicle Make: ISUZU
• Vehicle Model: MU-X (4WD)
• Engine Type: 4JJ3
• Engine: 3.0 L turbo diesel
• Year Range: 10/2021 – Current
• System Type: DPF back
• Pipe Diameter: 3.5″ (approx. 89 mm)
• Material: 409 stainless steel
• Construction: Mandrel-bent tubing, bolt-on configuration
• Sound Options: Resonator (medium) or pipe-only (loud)
• SKU: OE1696-S35
• Warranty: 5-year system warranty; 2-year extractor warranty where fitted

What’s in the Box

• Engine pipe
• Connecting pipe
• Pipe-only section
• Tail pipe
• Fitting kit (fasteners and gaskets; turbo gasket reused)

Compatibility

This 3.5″ Outback Exhaust ISUZU MU-X system fits the following:

• ISUZU MU-X 4WD models
• 3.0L 4JJ3 turbo diesel engines
• Vehicles built from October 2021 onward
• Vehicles retaining the factory diesel particulate filter (DPF)

Delivery & Lead Times

Outback Exhaust ships orders Australia-wide and internationally. A commercial delivery address works best, as carriers do not accept PO Boxes. Some systems ship in two cartons due to weight limits, and remote regions may receive a freight surcharge. Outback Exhausts provides export and remote-area freight quotes to ensure you receive the most accurate rate.

Remote residential locations may require collection from the nearest freight depot when door-to-door service is unavailable. Because theft and proof-of-delivery concerns occasionally occur, authority to leave is not recommended. International customers can request a shipping quote by supplying their location and postcode.

Professional Fitting Service on the Sunshine Coast

If you prefer a workshop installation, Sunshine Coast Diesel Tuning offers a complete supply-and-fit service for this 3.5″ Outback Exhaust ISUZU MU-X system. Our technicians specialise in late-model ISUZU platforms and set hanger alignment, clamp torque and clearances correctly to ensure reliable performance and warranty compliance.

To book an installation or discuss tuning options, contact us via www.scdieseltuning.com.au.