A cat-back exhaust system replaces everything from the outlet of your catalytic converter (or DPF, on modern diesels) through to the exhaust tip – so the factory or aftermarket cat and any emissions equipment stay exactly where they are. It's the most popular upgrade path for both petrol performance cars and 4WD utes because it improves sound and, on more restrictive factory systems, flow, without touching emissions compliance. We stock cat-back systems from Manta and XForce, built for popular platforms including Hilux, Ranger, Commodore and Patrol.

What does a cat-back exhaust system include?

A cat-back system covers everything from the outlet of the catalytic converter (or DPF on diesels) back to the tailpipe – typically the mid-pipe, muffler(s), tailpipe and exhaust tip. The cat or DPF itself is not included and stays in place.

Will a cat-back exhaust void my vehicle's emissions compliance?

Since the catalytic converter or DPF stays untouched, a cat-back system generally maintains your vehicle's emissions compliance. Overall exhaust noise still needs to meet your state's road rules, so check local noise limits before fitting.

How much power does a cat-back exhaust add?

Gains vary by vehicle and how restrictive the factory system was. Naturally aspirated engines typically see smaller gains than turbocharged engines, where reduced backpressure can noticeably help turbo response. The most consistent benefit across the board is sound.

Is a cat-back exhaust cheaper than a full turbo-back system?

Yes, generally. A cat-back kit covers less pipework than a turbo-back or DPF-back system, so it's usually the more affordable entry point into a performance exhaust upgrade.