This Everflo rear muffler (HOLDEN-COMMODORE-VP-VS-2-1-2-IRS-REAR-MUFFLER-EVERFLO) is the tail box for the IRS Holden Commodore VP–VS, on a 2in bore. The IRS-specific fitment is the point — it's cut for the independent-rear cars, which package the rear muffler differently to the live-axle ones.
Why the IRS-specific rear muffler?
Independent rear suspension changes how the rear of the car is packaged, so the IRS Commodores run their own rear muffler and pipe routing rather than the live-axle part. This Everflo is the box cut for those IRS VP–VS cars. As the rear muffler it's the last silencer in the system, so it has the most say in the note that leaves the tailpipe.
What does a 2in rear muffler suit?
On its 2in bore this Everflo matches the standard or lightly worked VP–VS. Swapping just the rear box lets you reset the tailpipe character without disturbing the centre of the system. There's no dB data published, so the honest way to judge the note is to hear a comparable IRS VP–VS fit rather than read a number.
Will it suit my IRS VP–VS?
It's listed to fit the IRS Holden Commodore VP–VS. The live-axle cars run a different rear box, so the rear-end type matters here. Confirm whether your car is IRS and check your exact build with the workshop before ordering.
What does fitting involve at our Illawarra workshop?
Oak Flats Muffler Men supplies and fits rear mufflers like this in-house across the Illawarra. Exhaust Systems Australia supplies the box; we match it to the IRS VP–VS rear hangers, check clearance over the independent rear and to the floor, and join it square so it sits without strain. Bring the car in and we'll confirm fitment and book the bay.
Stocked and fitted by Oak Flats Muffler Men, the Illawarra exhaust and 4x4 specialist in Oak Flats, NSW.
Common questions
Is this for IRS or live-axle cars?
IRS — it's cut for the independent-rear VP–VS. Live-axle cars run a different rear box.
Centre or rear muffler?
Rear — the tail box that sets the final note.
What bore is it?
A 2in rear muffler for the IRS VP–VS.
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.
Send the vehicle make, model, year, engine, current issue, desired sound or performance goal, and clear photos of the existing exhaust where available.