De Graaf Standard Exhaust Systems since 1958

De Graaf standard exhaust systems are manufactured using CNC mandrel bending with quiet performance and a proper fit giving you high performance and value for money.

Bolt-on Exhaust Systems

Aftermarket Bolt-on exhaust

These systems are designed to replace original rear mounted mufflers located behind the rear axle using factory style connections. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially selected mufflers. Like all De Graaf systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.

Prices and options vary, as do opinions about the fitting of an aftermarket exhaust systems and the improvements offered by these systems. Depending on your vehicle, we carry different performance exhaust systems and exhaust components.

CNC Mandrel Bends

The only way to maintain a uniform tube diameter through any bend is to use a mandrel inside the tube while bending it. The reason mandrel bends are important, is simple: airflow. A non-mandrel bend can reduce airflow by up to 35%. Most muffler shops don’t have mandrel bending machines, they’re just too expensive. So, while your local muffler man says he can custom make you an exhaust, chances are you’d be better off stock! Our De Graaf Exhausts are bent on CNC mandrel bending machines capable of bending to exacting tolerances. Each part is then test-fitted in a precision fixture before it is approved for sale.

Quiet Performance

Unlike some other sporting exhausts, our aftermarket De Graaf Exhaust Systems are designed with comfortable sound levels in mind. No one should have to put up with a noisy, buzzy exhaust (local law enforcement included) just to get horsepower.

Proper Fit

Obvious, you say? You’d think so, but believe it or not, proper fit is more often overlooked than not. At De Graaf factory we take fitment very seriously. Our exhausts mount using the original hanger locations and follow the path in the body that offers the most clearance possible. This assures the installation will be clunk free and hassle free.
Clamps & Hangers

We use OEM-type shell clamps in all of our Bolt-on Exhausts. They’re extremely strong and seal each connection in a uniform manner. They won’t deform or pinch the tube like saddle (u-bolt) clamps do. We also supply first quality OEM rubber hangers with our systems (where applicable). OEM hangers last longer and support the exhaust better.

bolt-on exhaust systems

High Quality

We strive to make the best quality aftermarket exhaust systems available. If you’re given the opportunity to compare a De Graaf Exhaust to any of our competition first hand, we know you’ll see the difference immediately. We believe that high quality materials and construction techniques are instrumental to overall build quality. Even the condition of manufacturing equipment plays a big role in the finished product’s worth. Our manufacturing facility uses the latest equipment and continuously updates machines and tooling to maintain a high-quality product.

High Performance

True “high performance” is achieved only when the increase in performance obtained is suited for its intended purpose. De Graaf Exhaust Systems are designed as an overall package for the street driver that improves power across a broad rpm range, not just one that sacrifices it all to get the biggest dyno number as 7 000 rpm.

Value

Value is perhaps the most important feature of a De Graaf Exhaust. Compare what’s out there, what you get, Rand for Rand, and we think you’ll agree that we have the best value in an exhaust system there is.

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Mufflers on standard exhaust systems

Mufflers

Our mufflers ensure a comfortable noise level on all our standard exhaust systems without compromising performance.

Exhaust System Accessories

Find all the exhaust system accessories to optimise to a high-performance exhaust system at De Graaf.

De Graaf Exhaust Systems Accessories

sport box and tips

Sport Box & Tips

A most affordable way to upgrade your exhaust system is to replace the back box only. Not only will your system’s performance improve, it will also look and sound better.