Nissan Patrol GQ Wagon 4.2L TD42 3" Turbo Back Exhaust System 1991-1994

Premium 3" Turbo-Back Exhaust System for Nissan Patrol GQ Wagon 4.2L TD42

Transform your Nissan Patrol GQ Wagon 4.2L TD42 with our premium 3" stainless steel turbo-back exhaust system. Engineered and manufactured in Australia specifically for the 1991-1994 Patrol GQ Wagon with the legendary 4.2L TD42 6-cylinder turbo diesel engine, this complete exhaust delivers improved performance, enhanced sound, and exceptional durability for your iconic 4x4.

Key Features & Benefits

• Premium 409 Stainless Steel Construction - Superior corrosion resistance for Australian conditions
• 3" Mandrel Bent Tubing - Optimized diameter for the TD42 engine, maximizes exhaust flow
• Complete Turbo-Back System - Full replacement from turbo outlet to rear for maximum performance gains
• Bolt-On Installation - Direct replacement
• Australian Engineered - Designed and manufactured locally for local conditions
• 5-Year Warranty - Comprehensive coverage for peace of mind
• Improved Performance - Better throttle response, power delivery, and fuel efficiency
• Enhanced Sound - Deep, refined 6-cylinder diesel exhaust note without drone
• Catalytic Converter Included - Maintains emissions.
• Muffler / Resonator option available - Optimized sound control for refined note
• Lightweight Design - Only 23kg for improved performance

Vehicle Compatibility

• Fits: Nissan Patrol GQ Wagon 4.2L TD42 6-Cylinder Turbo Diesel (April 1991 - October 1994)
• Engine: 4.2L TD42 6-Cylinder Turbo Diesel
• Configuration: Complete turbo-back system with catalytic converter and Muffler / Resonator
• Models: GQ Wagon variants with 4.2L TD42 engine
• Note: Specifically designed for the Wagon body style

Technical Specifications

• Material: 409 Grade Stainless Steel
• Pipe Diameter: 3 inch (76mm)
• Construction: Mandrel bent tubing, MIG welded
• Weight: 23kg
• System Type: Turbo-Back with catalytic converter and muffler / resonator
• SKU: OE5698-S

What's Included

• Complete turbo-back exhaust system
• High-flow catalytic converter
• Muffler / Resonator
• All Gaskets and hardware
• 5-year manufacturer warranty

Installation

This is a complete bolt-on replacement exhaust system designed for straightforward installation. Most customers with basic mechanical skills and tools can install this system in 2-3 hours. Professional installation is recommended for best results. No cutting or welding required - simply remove the factory exhaust from the turbo outlet back and bolt this system in place.

Performance Benefits

The 3" mandrel bent design is specifically sized for the Patrol GQ's legendary 4.2L TD42 6-cylinder turbo diesel engine, providing optimal exhaust flow and significantly reducing back pressure compared to the restrictive factory system. You'll experience improved throttle response, better power delivery throughout the rev range, and enhanced fuel efficiency. The complete turbo-back design maximizes performance gains, with noticeable improvements when towing, loaded, or tackling challenging off-road terrain. The high-flow catalytic converter maintains emissions compliance while maximizing performance, and you'll enjoy that distinctive 6-cylinder diesel exhaust note.

Frequently Asked Questions

 

Will the outback exhaust improve performance on my Patrol GQ?

Yes, the 3" mandrel bent turbo-back design reduces exhaust back pressure significantly, resulting in improved throttle response, better power delivery, and enhanced fuel efficiency. Most customers report noticeable improvements in drivability, especially when towing, loaded, or off-roading. The legendary 4.2L TD42 engine responds particularly well to the complete turbo-back system.

How does the outback exhaust sound?

The outback exhaust produces a deep, refined tone that enhances the distinctive 6-cylinder diesel character. It's noticeably sportier than stock without being overly loud. You'll hear a satisfying growl under acceleration with minimal noise at cruise - perfect for daily driving, touring, and off-road adventures.

What's included in the 5-year warranty?

The Outback Exhausts 5-year warranty covers manufacturing defects, material failure, and weld integrity under normal use. It does not cover damage from accidents, improper installation, modifications, or extreme off-road abuse. 

Do I need to tune my vehicle after installing the outback exhaust?

No tune is required. The outback exhaust works perfectly with the factory ECU calibration and will provide noticeable improvements on its own. However, many Patrol owners choose to add a tune later to maximize the performance benefits of improved exhaust flow, especially for towing and heavy-duty use.

How long does shipping take?

Most orders ship within 1-2 business days. Delivery times vary by location: metro areas typically receive orders within 3-5 business days, while regional areas may take 5-7 business days.

Do you ship internationally?

Yes, Outback Exhausts ship internationally to select countries. International shipping costs and delivery times vary by destination. Enter your country and postcode at checkout for accurate freight quotes. Please note that international customers are responsible for any customs duties, taxes, or import fees charged by their country. Contact us for specific international shipping enquiries.

Can I install the outback myself?

Yes, the outback exhausts is a bolt-on system designed for DIY installation. You'll need basic hand tools, jack stands or a hoist, and 2-3 hours. However, professional installation is recommended if you're not confident working under your vehicle.

 

What's the difference between turbo-back and DPF-back?

A turbo-back system (like this one) replaces the entire exhaust from the turbo outlet to the rear, including the catalytic converter. A DPF-back system only replaces the exhaust from the DPF outlet back. The 1991-1994 Patrol GQ models did not have DPF systems, so turbo-back is the appropriate configuration for maximum performance gains. This system includes a high-flow cat and muffler / resonator.

Will the outback exhausts fit other Patrol models or body styles?

The outback exhaust system is specifically designed for the Nissan Patrol GQ Wagon (1991-1994) with the 4.2L TD42 engine. It will not fit other body styles like the Ute or Cab Chassis, or other Patrol generations like GU. Please contact us if you need an exhaust for a different Patrol model - we have specific systems for various Patrol configurations.

Does the outback exhaust improve fuel economy?

Yes, many customers report improved fuel efficiency after installing this exhaust, particularly during highway driving and when maintaining steady speeds. The reduced back pressure allows the engine to work more efficiently. However, actual fuel savings will vary based on driving style, load, and conditions.

Will the outback exhaust rust?

Our 409 stainless steel construction provides excellent corrosion resistance for Australian conditions. While 409 stainless may develop some surface discoloration over time (especially in coastal or high-humidity areas), it will not rust through like mild steel exhausts. This is why we can confidently offer a 5-year warranty.

Can I use the Outback exhaust for towing and off-roading?

Absolutely! The outback exhaust is ideal for towing and off-road applications. The improved exhaust flow reduces back pressure, which helps the engine breathe better under load. Many Patrol owners specifically upgrade their exhaust to improve towing performance and off-road capability, and the TD42 engine responds particularly well to the reduced restriction when pulling heavy loads or tackling challenging terrain.

What is the TD42 engine?

The TD42 is Nissan's legendary 4.2L 6-cylinder turbo diesel engine used in the Patrol GQ. Known for its reliability, torque, and durability, the TD42 is highly regarded in the 4x4 community and responds exceptionally well to exhaust upgrades. It's one of the most popular engines for touring and off-road use in Australia.

Ready to unleash your Patrol GQ's potential?

Order now and experience the Outback Exhausts difference. Australian made, backed by our 5-year warranty, and ready to ship Australia-wide and internationally.