3.5" DPF Back Exhaust System - GWM Cannon NPW 2.0L GW4D20M Turbo Diesel (2020-2025) | Outback Exhausts

Premium 3.5" DPF Back Exhaust System for GWM Cannon NPW 2.0L GW4D20M Turbo Diesel

Unleash the full potential of your 2020-2025 GWM Cannon NPW 2.0L GW4D20M turbo diesel. This premium 3.5-inch DPF back exhaust system is precision-engineered in Australia specifically for the GWM Cannon, delivering substantial gains in power, torque, and fuel efficiency while reducing exhaust gas temperatures and turbo lag.

Key Features & Benefits

• Premium 409 Stainless Steel Construction - Superior corrosion resistance designed for Australian conditions, built to outlast mild steel systems by decades
• Full 3.5" Mandrel Bent Tubing - Smooth, unrestricted exhaust flow maximizes turbo efficiency and engine performance
• DPF Back Design - Complete system from DPF (Diesel Particulate Filter) to rear, eliminating restrictive factory components while maintaining emissions compliance
• Bolt-On Fitment - Direct replacement design with all gaskets, flanges, and hardware included for straightforward installation
• Australian Engineered & Manufactured - Designed, tested, and built in Australia for Australian driving conditions and GWM Cannon specifications
• 5-Year Warranty - Comprehensive coverage on materials, welds, and corrosion perforation backed by our confidence in quality
• Enhanced Exhaust Note - Deep, aggressive diesel note without excessive cabin noise

Performance Improvements You'll Experience

This 3.5-inch DPF back system dramatically reduces backpressure compared to the restrictive factory exhaust, allowing your GW4D20M turbo diesel to breathe freely. Expect improved throttle response with noticeably reduced turbo lag, stronger mid-range torque for towing caravans, trailers, and boats, increased top-end power for highway overtaking and loaded driving, lower exhaust gas temperatures for improved engine longevity and DPF health, quicker turbo spool for more responsive acceleration, and potential fuel economy gains of 10-15% under highway driving conditions. The larger 3.5" diameter is specifically optimized for the GW4D20M's output, providing maximum flow while maintaining proper exhaust velocity.

Perfect For

• 4x4 touring and remote area expeditions
• Towing heavy caravans, camper trailers, boats, and work equipment
• Daily driving and long-distance highway cruising
• Off-road adventures, beach driving, and farm work
• Commercial and trade applications
• Replacing worn, rusted, or damaged factory exhaust systems
• Enthusiasts seeking maximum performance and aggressive sound

What's Included

Complete DPF back exhaust system with all necessary gaskets (excluding turbo gasket), flanges, and mounting hardware for professional or DIY installation. System weight: 22kg.

Fitment Specifications

• Make: GWM (Great Wall Motors)
• Model: Cannon NPW (Ute/Pickup)
• Engine: 2.0L GW4D20M Turbo Diesel (4-cylinder)
• Years: September 2020 - 2025
• Configuration: DPF Back (from Diesel Particulate Filter to rear)
• Pipe Diameter: 3.5 inch (88.9mm)
• Material: 409 Grade Stainless Steel
• Weight: 22kg

Why Choose Outback Exhausts?

With decades of experience in the Australian 4x4 exhaust market, Outback Exhausts has earned a reputation for building systems that survive the harshest conditions. Every system is precision-engineered using advanced mandrel bending technology to maintain consistent pipe diameter through all bends, ensuring maximum flow without restrictions. Our MIG welding ensures leak-free, durable joints that withstand extreme vibration and temperature cycling. Each system is test-fitted on actual GWM Cannon vehicles to guarantee perfect alignment and fitment. We stand behind our work with a comprehensive 5-year warranty and Australian-based customer support.

Frequently Asked Questions

Will this Outback exhaust fit my GWM Cannon?

Yes, Outback Exhausts are specifically designed for GWM Cannon NPW models with the 2.0L GW4D20M turbo diesel engine manufactured from September 2020 to current 2025 models. It's a direct bolt-on replacement for the factory DPF back system. Please verify your engine code (GW4D20M) before ordering - this is typically found on the engine cover or compliance plate.

How much power gain can I expect from an Outback Exhaust?

The Outback Exhaust 3.5" DPF back system typically delivers 15-25 horsepower gains at the wheels, with even more substantial improvements in torque throughout the rev range. Most owners report the biggest difference in throttle response, reduced turbo lag, and stronger mid-range pulling power. The turbocharged GW4D20M responds exceptionally well to reduced backpressure, making the Cannon feel significantly more responsive, especially when loaded or towing heavy trailers and caravans.

Is the Outback exhaust louder than the factory system?

Yes, this system produces a noticeably deeper, more aggressive diesel tone compared to the very quiet factory exhaust. It has a satisfying rumble at idle and a purposeful growl under acceleration, with nice turbo whistle and wastegate sounds. However, it's not excessively loud during highway cruising - the sound level is ideal for those who want improved performance and a more engaging exhaust note without excessive cabin noise. It's significantly quieter than straight-through systems.

Can I install the Outback Exhaust myself or do I need a mechanic?

This is a bolt-on DPF back system designed for straightforward installation. Experienced home mechanics with proper tools, a quality jack and stands, and basic exhaust work experience can complete the installation in 2-3 hours. The DPF back design means you're working from the DPF outlet rearward, which is more accessible than full turbo back systems. However, professional installation is recommended if you're not comfortable working under your vehicle or dealing with potentially seized exhaust bolts. All necessary gaskets and hardware are included.

Will this Outback exhaust improve fuel economy?

Yes, many customers report improved fuel economy, particularly during highway driving and when towing. The reduced backpressure and improved turbo efficiency allow the GW4D20M engine to operate more efficiently. Typical improvements range from 10-15%, with the biggest gains seen during steady-state highway cruising and when towing. Results depend on driving style, vehicle condition, load, and terrain, but the larger 3.5" diameter provides measurable efficiency improvements.

Why 3.5" diameter instead of 3"?

The 3.5" diameter is specifically optimized for the GW4D20M's power output and turbo characteristics. The GWM Cannon's turbocharged diesel produces significant exhaust volume, and the larger 3.5" diameter provides maximum flow reduction in backpressure while still maintaining proper exhaust velocity. This size delivers the best balance of low-end torque, mid-range power, and top-end performance for both stock and modified Cannons. It's particularly beneficial for towing and heavy-load applications.

How long will an Outback exhaust last?

Our 409 stainless steel construction is built for extreme durability. In typical Australian conditions, you can expect 15-20+ years of service life. The stainless steel resists corrosion far better than mild steel systems, which is especially important for beach driving, river crossings, coastal environments, and the high-temperature operation of modern turbocharged diesels. We back this with a comprehensive 5-year warranty against manufacturing defects and corrosion perforation.

How long does shipping take?

Yes, we ship world-wide with fast dispatch. Most orders are dispatched within 24 hours. Metro areas typically receive orders within 3-5 business days, while regional and remote areas may take 5-10 business days. This is a large, heavy item (22kg), so freight times may vary by location. Full tracking information is provided for all shipments so you can monitor your delivery progress.