Is the STR178 the cheapest way to change my Commodore's exhaust note?

At an RRP of $144.99 it's one of the more affordable cat-backs in this range. It replaces the section behind the catalytic converter.

Will it suit my Holden Commodore?

It's listed to fit the Holden Commodore from 09/2007. Confirm your exact variant with the workshop before ordering.

Does it keep the catalytic converter?

Yes — it's a cat-back, so the factory cat stays in place.

STR178

Redback Performance Exhaust System for Holden Commodore

Redback Redback Performance Exhaust System.

BrandRedbackSWD

Category: Complete exhaust systems

RRP $144.99 AUD

In stock at supplier

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Redback Performance Exhaust System for Holden Commodore (09/2007 - 09/ product image

Part specs

Vehicle Make: Holden
Coating: Standard Heat-Proof Paint
Tube Size: 076mm (3")

Redback STR178 is a cat-back exhaust listed to fit the Holden Commodore from 09/2007. At an RRP of $144.99, it is one of the more affordable rear-section options in this Redback range.

What does fitting involve at our Illawarra workshop?

Oak Flats Muffler Men supplies and fits the STR178 in-house across the Illawarra. We drop the factory rear section, offer the STR178 up, and confirm the muffler and tailpipe clear the underbody and sit square in the hangers. On a Commodore of this vintage we also check the rubber mounts and rear flange, since those can perish with age. The part is matched to your build before it's bolted up.

What is a cat-back, and what does this one change?

A cat-back is the rear of the exhaust behind the catalytic converter — pipe, muffler and tailpipe as a single section. Fitting it changes the back-half flow and the exhaust note while the cat and front plumbing stay factory, which is why it is the lighter exhaust job. At this price the STR178 is a straightforward rear-section swap. Redback hasn't published its diameter or material on this listing, so we confirm those against the part.

Will it suit my Commodore?

This listing covers the Holden Commodore from 09/2007. Fitment feed data can be imperfect, so it's listed to fit rather than guaranteed — give the workshop your exact engine and body and we'll confirm the STR178 against your build before ordering.

Is it road legal?

Because the STR178 is a cat-back, it doesn't remove or alter the catalytic converter, so the factory emissions hardware stays in place. Final registration and noise compliance depend on the specific car, so confirm NSW requirements with us before booking.

Stocked and fitted by Oak Flats Muffler Men, the Illawarra exhaust and 4x4 specialist in Oak Flats, NSW.

Common questions

Is the STR178 the cheapest way to change my Commodore's exhaust note?: At an RRP of $144.99 it's one of the more affordable cat-backs in this range. It replaces the section behind the catalytic converter.
Will it suit my Holden Commodore?: It's listed to fit the Holden Commodore from 09/2007. Confirm your exact variant with the workshop before ordering.
Does it keep the catalytic converter?: Yes — it's a cat-back, so the factory cat stays in place.

Fitment support across the Illawarra

Fitment checks near you across 18 Illawarra suburbs, from Oak Flats and Shellharbour to Wollongong and Kiama.Show nearby fitment areasCollapse section

Oak Flats Muffler Men can check this part against supplier specs, part number, image, RRP and vehicle details for customers around Oak Flats, Shellharbour, Wollongong, Dapto, Albion Park, Kiama and the northern suburbs.

Book the right exhaust job without guessing.

Send the vehicle make, model, year, engine, current issue, desired sound or performance goal, and clear photos of the existing exhaust where available.

Unit 2/8 Shaban St, Albion Park Rail NSW 2527 02 4256 3740 sales@mufflermen.com.au Send vehicle details