A custom exhaust may seem like a simple upgrade, but it delivers a big impact on boosting your vehicle’s performance, sound, and efficiency. Whether you’re tackling long country highways, navigating rough off-road terrain, or cruising in a classic muscle car a custom exhaust can be a game-changer. But with so many options to choose from, it’s easy to feel overwhelmed.
This guide will cover everything you need to know about custom exhaust upgrades, from choosing the right exhaust for your vehicle, what to expect during installation, and how to keep it in top condition.
What is a custom exhaust?
Your vehicle’s exhaust system plays a crucial role in managing emissions, controlling noise, and optimising engine performance. It directs exhaust gases away from the engine, reducing harmful pollutants while ensuring your vehicle runs smoothly and efficiently.
A custom exhaust system goes beyond factory limitations, allowing for better airflow, improved fuel efficiency, and enhanced power output. By upgrading key components such as the muffler, catalytic converter, and pipe diameter, you can achieve a more responsive, efficient, and powerful driving experience.
Stock vs Custom Exhausts: What’s the difference?
Stock exhausts are designed for efficiency, emissions compliance, and noise reduction, but they often restrict airflow and limit performance.
Custom exhausts improve airflow, allowing your engine to breathe better, increase power output, and enhance sound.
Types of Custom Exhaust Systems
There are different levels of customisation depending on what you want from your vehicle:
Axle-Back Exhaust replaces the muffler and tailpipes, affecting sound and performance.
Cat-Back Exhaust upgrades everything from the catalytic converter back, improving sound and horsepower.
Full Custom System includes performance headers, high-flow cats, and pipework designed for maximum power gains.
Choosing the Right Exhaust System For Your Needs
Finding the right balance between performance and sound isn’t always easy, as too much can compromise the other, but a well-chosen exhaust delivers both.
Bigger pipes increase exhaust flow but can reduce back pressure, affecting low-end torque.
Different muffler types (straight-through, chambered, turbo) determine noise levels.
High-flow catalytic converters improve power but must meet emissions regulations.
Signs It’s Time to Upgrade Your Exhaust
If you’re considering a custom exhaust, ask yourself:
- Do you want more power or better throttle response?
- Are you looking for a deeper, throatier sound?
- Is your current exhaust rusted, leaking, or damaged?
- Do you want to improve your vehicle’s fuel efficiency?
- Are you customising your car for off-road, work, or performance?
If you answered yes to any of these, it’s time to explore your exhaust options.
| Material | Pros | Cons |
|---|---|---|
| Mild Steel | Affordable, easy to weld | Prone to rust, shorter lifespan |
| Stainless Steel | Corrosion-resistant, durable | More expensive |
| Titaniam | Ulta-lightweight, premium quality | Most expensive option |
Legal considerations
Before modifying your exhaust, check Western Australian road laws on noise limits and emissions compliance. Your exhaust should be engineered to balance power, sound, and legality, especially if you drive a 4WD in national parks or a performance car in urban areas.
- Noise Restrictions: A system that’s too loud could get you defected by WA Police.
- Emissions Compliance: Ensure high-flow catalytic converters meet legal standards.
- Roadworthiness: Avoid straight-pipe setups that may result in fines or failed inspections.
If you’re unsure, contact the team at DAPCO Bunbury can help you find a legal, high-performance custom exhaust for your vehicle.
Choosing the Right Exhaust For Your Vehicle Type
Out here in Western Australia we face unique driving challenges, long-distance travel, off-road terrain, and harsh weather conditions. Different exhaust systems offer unique benefits depending on your vehicle’s needs, here’s how to pick an exhaust suited to your needs:
| Vehicle Type | Basic Exhaust Type | Key features | Why Is It a Good Fit? |
|---|---|---|---|
| Work Vehicle | Mild steel or stainless steel, 2.5"-3" system | Durable, reliable, moderate noise, improves fuel efficiency | Balances performance and economy, withstands daily use, not overly loud for job sites |
| Off-road 4WD | High-Flow Stainless Steel or Titanium, 3" System with Mandrel Bends | Rust-resistant, high clearance, maximised airflow, deep growl | Handles mud, water, and extreme conditions while boosting low-end torque |
| Hot Rod or Muscle Car | Stainless Steel or Titanium, 3"-4" Dual System with Headers | Maximum horsepower, aggressive sound, show-quality finish | Prioritises power and sound, enhances classic car aesthetics |
Choosing the right system depends on how you use your vehicle, work vehicles need durability and emissions reduction, 4WDs need clearance, while muscle cars need that raw power and sound we all know and love.
The Custom Exhaust Buying Process
Step 1: Research & Set a Budget
The cost of a custom exhaust varies depending on the type of system, materials, and installation complexity. Axle-back systems are generally the most affordable, while cat-back exhausts fall in the mid-range. A full custom system will be the most expensive, especially if high-performance materials like stainless steel or titanium are used. It’s important to set a budget that aligns with your goals while ensuring quality and durability.
Step 2: Choosing a Reputable Supplier & Installer
Finding a local expert is key to getting the right exhaust for Western Australian road conditions. Look for:
- Experience in custom exhaust fabrication
- Workshops with proven results and customer reviews
- A team that understands local road regulations
At DAPCO Bunbury, we specialise in custom exhaust systems. Whether you’re a tradie, off-road enthusiast, or muscle car owner, we’ll build an exhaust that fits your needs.
Step 3: Discussing Your Goals with an Expert
Whether you’re after a deep, aggressive rumble or a more refined performance boost, it’s important to clarify your priorities. Are you focused on sound, power, or a balance of both?
Our team will guide you through the best options to ensure your new exhaust meets your performance goals and legal requirements.
Step 4: Installation & Fine-Tuning
Installation time depends on material availability and the complexity of your setup. If materials are on hand, the process is quicker, but sourcing specific components may extend the timeline.
Basic exhaust upgrades typically take a few hours, while full custom systems can require a full day. After installation, fine-tuning ensures proper fitment, preventing leaks, rubbing, or clearance issues.
Maintenance & Longevity Tips for Your New Exhaust
Western Australian roads can be harsh, so regular maintenance is key to keeping your exhaust in top shape for years to come. Here’s how to keep it in top condition:
- Regular cleaning: Remove dirt, carbon buildup, and road debris.
- Rust Prevention: Stainless steel is best, but regular inspections help prevent corrosion.
- Listen for Changes: Rattling or droning noises can signal exhaust leaks or loose fittings.
Keeping your exhaust well-maintained ensures longer lifespan and optimal performance.
Why Choose DAPCO Bunbury for Your Custom Exhaust Upgrade
At DAPCO Bunbury, we specialise in crafting high-quality custom exhaust systems tailored to your vehicle’s needs. Whether you’re looking to boost power, improve efficiency, or enhance your vehicle’s sound, our experienced team will help you find the perfect solution.
From heavy-duty work vehicles needing durability, to off-road 4WDs requiring maximum clearance and performance, and classic muscle cars demanding an aggressive sound and sleek finish, we build exhausts that deliver results.
Ready to upgrade? Contact DAPCO Bunbury today and we’ll design the perfect custom exhaust for your vehicle.
