Muffler & Exhaust Upgrades

If your factory exhaust is holding you back, it’s time to upgrade. At OSP Automotive & Marine, we install performance exhausts in Grafton that deliver serious gains — not just noise. You’ll get better flow, more torque and a deeper note that makes your presence known.

Whether you’re chasing muffler upgrades, full custom systems or want to wake up your engine, we’ll get you sorted with precision installation and quality parts built for Aussie conditions. Our team works on all makes and models and understands how exhaust flow connects to overall vehicle performance.

​

 

Pair it with EFI and mechanical fault diagnosis to optimise your setup, or talk to us about mechanical repairs and 4x4 upgrades while you’re here. No inflated dealership rates, no pressure—just honest advice and high-calibre work.

 

Sound, Flow, Performance

A well-designed exhaust system isn’t just about noise—it’s about balance. Our muffler and exhaust upgrades are tailored to enhance your vehicle’s output while maintaining driveability.

That means better throttle response, cleaner emissions and smoother power delivery—all without overdoing it.

​

We work with quality systems that improve airflow without throwing your setup off balance. Whether you want a bolt-on performance exhaust or a custom configuration to suit other mods, we’ll make sure it’s fitted right and tuned to your driving style.

​

 

Our team knows what works, what doesn’t and how to avoid the common pitfalls of poor installations. Let’s get your exhaust sorted—talk to us about upgrades that actually make a difference.