Your DPF and Cat Converter Experts

What’s so great about Promission?

Product knowledge

40 years combined knowledge in emissions

OE Styling

Modelled after original manufacturer to ensure ease of fitment

Customer Support

Small Australian based team means no robots!


2 years/60,000km warranty for piece of mind


Stainless steel shell with top-quality core


Often less than half the price of genuine parts

About us

Promission is committed to earning your trust by providing the expertise, value and responsiveness you expect.

Our passion for emission technology goes back to the 1980’s, when the automotive industry collectively started looking for more cost effective alternatives to OE emission devices. With 40 years of experience at Humex/Promission, we work with high quality manufacturers around the world in our efforts to strive for our focused mission to give the people of Australia what they need; OE quality aftermarket emission products at a reasonable price.

Based in the beautiful Hunter Valley, and staffed by well trained and passionate professionals, you can be sure you’re in safe hands and will never be treated as just a number in a line. Read More...

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Our Products

We offer a variety of services to help you get back on the road.