Cat-Back Exhausts

Our cat-back range covers platforms including Subaru WRX and STI, Toyota GR86, BRZ and 86, Nissan 350Z and 370Z, Mazda MX-5, Honda Civic Type R, Toyota GR Yaris and Volkswagen Golf GTI and R. Model coverage varies by system and generation, so use the filters on this page or contact us with your build date and trim and we'll point you to the right fitment.

• Axle-Back Exhausts: rear muffler section only, the easiest entry point for a sound change
• Turbo-Back Exhausts: full system from the turbo outlet back, for bigger flow gains
• Mid Pipes: the connecting section between cat and muffler
• Mufflers: standalone rear silencers for a targeted tone change
• Muffler Delete Pipes: straight pipe in place of the rear silencer
• Exhaust Accessories: clamps, hangers and gaskets to finish the job

A cat-back is where most people start because it bolts on and leaves the emissions-critical parts alone. The systems we choose to carry use mandrel-bent stainless steel, which holds full pipe diameter through the bends and resists corrosion far better than crush-bent mild steel.

Material and diameter matter more than the badge. On a turbo car, a well-sized cat-back can reduce backpressure enough to show a real gain, especially once a downpipe is in the mix. On a naturally aspirated engine the change is mostly tone, with a small top-end improvement at best, and oversized piping can cost low-rpm response. Resonated systems keep highway drone down; straight-through designs are louder and best suited to cars that see track days.

Cat-back systems bolt to the factory cat flange and reuse the existing hanger points, so most fit without cutting on an unmodified car. AU-delivered models can differ from JDM and US-spec variants in flange position, hanger spacing and tip cutout, so check the listed fitment against your model year, engine and build date before ordering.

Fresh gaskets and clamps are worth having on hand even on a direct bolt-in, and perished factory hanger rubbers are best replaced while the old system is down. Installers generally want a hoist, penetrating fluid for the factory hardware and room to reposition heat shields or a spare tyre well cover on some platforms. Tip alignment usually needs a final adjustment at the hangers before the clamps are torqued.

• Downpipes
• Sports Cats
• De-Cat Pipes (race and motorsport use only)
• Exhaust Headers
• All Exhaust Parts

Will a cat-back exhaust fit my exact model and trim?
Fitment varies by build date, engine and whether the car is AU-delivered. Check the compatibility listed on each product page, or send us your details and we'll confirm before you order.

Do I need to change the catalytic converter too?
No. A cat-back starts behind the cat, so your factory or sports cat stays where it is.

Will a cat-back make my car too loud for the street?
That depends on the design. Resonated systems stay closer to factory volume and reduce highway drone. Straight-through systems are considerably louder and suit track use more than a daily commute.

Do I need a tune after fitting one?
Not usually on its own. A cat-back rarely needs retuning, though a tune is worth considering if you also change the downpipe or run other supporting mods.

Do you ship cat-back exhausts Australia-wide?
Yes, we ship nationally. Longer systems are boxed to protect the pipework and tips in transit.