How many mufflers does the MKHN0137 have?

Two per side across a dual layout — four in total — making it the most restrained of the 3in dual options.

It's a 3in dual — the larger pipe option run as twin pipes, suited to a worked or bigger-breathing V8.

Does it keep the catalytic converter?

Yes — as a cat-back, the factory converter and front pipework stay in place.

MKHN0137

VY V8 HSV Sedan 3in Dual Catback Muffler

MPI Automotive VY V8 HSV Sedan 3in Dual Catback Muffler/Muffler.

BrandMantaMPI Automotive

Category: Mufflers and resonators

RRP $1601.67 AUD

In stock at supplier

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VY V8 HSV Sedan 3in Dual Catback Muffler/Muffler product image

Part specs

SKU: MKHN0137
Supplier: MPI Automotive
Category: Mufflers and resonators
Vehicle fitment: Holden
Stock status: In stock at supplier

Running twin mufflers in each line, the MPI Automotive MKHN0137 is the fully silenced 3in dual cat-back for the VY HSV V8 sedan. Two boxes per side on the larger bore make it the most restrained of the 3in dual layouts for the VY.

Why two mufflers per side on a 3in dual?

A muffler-into-muffler run sends the gas through two silencing stages per pipe, and across a dual that's four mufflers shaping the note. On a 3in bore — the larger pipe — that combination lets the V8 breathe through twin pipes while the twin boxes hold the volume back to the most measured of the 3in dual options. We can't put a number on it; a comparable twin-muffler fit is the honest reference.

What does the 3in dual bore suit?

Three inches is the larger pipe, and run as a dual it gives the V8 two of them — capacity for a worked or bigger-output engine. Paired with twin mufflers, the MKHN0137 keeps that flow while delivering a controlled note rather than a loud one. It stays a cat-back, so the catalytic converter and front pipework are retained as the factory fitted them.

Will it fit my VY HSV sedan?

It's listed to fit the VY HSV V8 sedan. The dual routing and hanger spacing are particular to that body; confirm your exact build with the workshop before ordering, since the VY HSV range ran several variants.

How do we fit it in the Illawarra?

Oak Flats Muffler Men supplies and fits the MKHN0137 in-house across the Illawarra. We hang both pipes and all four mufflers on the car's mounts, check clearance to the floor and rear valance on each side, and join every stage square. 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

How many mufflers does the MKHN0137 have?: Two per side across a dual layout — four in total — making it the most restrained of the 3in dual options.
What bore is it?: It's a 3in dual — the larger pipe option run as twin pipes, suited to a worked or bigger-breathing V8.
Does it keep the catalytic converter?: Yes — as a cat-back, the factory converter and front pipework stay 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

VY V8 HSV Sedan 3in Dual Catback Muffler

Part specs

Why two mufflers per side on a 3in dual?

What does the 3in dual bore suit?

Will it fit my VY HSV sedan?

How do we fit it in the Illawarra?

Common questions

Fitment support across the Illawarra

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Book the right exhaust job without guessing.