What's the difference between the centre muffler and the rear hotdog on the SSMKNI0107?

The centre muffler is the main chambered silencer that controls volume; the rear hotdog is a compact straight-through resonator that targets drone frequencies on the way out rather than quietening further.

Does the SSMKNI0107 replace the whole exhaust?

No — it runs from the e-pipe back, so it replaces the rearward section of the Patrol GU 4.5L exhaust, not the engine-back pipework. Confirm your exact setup with the workshop.

What pipe size is this system?

It's built to a 2.5in bore, sized for the GU Patrol 4.5L rather than a larger modified engine.

SSMKNI0107

Nissan Patrol GU 4.5L 2.5in System Off E- Pipe Centre Muffler & Rear Hotdog

Nissan Patrol GU 4.5L 2.5in System Off E- Pipe Centre Muffler & Rear Hotdog (SKU: SSMKNI0107) Engineered

BrandMantaMPI Automotive

Category: Mufflers and resonators

RRP $1143.73 AUD

In stock at supplier

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Nissan Patrol GU 4.5L 2.5in System Off E- Pipe Centre Muffler & Rear Hotdog product image

Part specs

SKU: SSMKNI0107
Supplier: MPI Automotive
Category: Mufflers and resonators
Vehicle fitment: Nissan
Stock status: In stock at supplier

Built around a 2.5in pipe, the MPI Automotive SSMKNI0107 pairs a centre muffler with a rear hotdog resonator for the Nissan Patrol GU 4.5L, taking over from the e-pipe back. That muffler-then-hotdog split is the defining trait here: the chambered centre does the bulk of the quietening, while the compact rear hotdog trims drone on the way out.

Why a centre muffler plus a rear hotdog?

A hotdog is a small, straight-through resonator, and pairing it behind a full centre muffler is a deliberate two-stage approach. The centre muffler handles the heavy lifting on volume through its chambers, and the rear hotdog is there to tidy up the resonant frequencies that cause cabin drone at a steady throttle, rather than to cut volume again. On a 4.5L petrol straight-six like the GU Patrol's, that combination aims for a usable touring note instead of a single big silencer doing everything.

What does the 2.5in bore suit?

This system is built to a 2.5in diameter, a sizing that sits sensibly with the GU 4.5L's output rather than the larger bore you'd reach for on a heavily worked engine. The 2.5in pipe keeps gas speed reasonable for road and touring use while flowing more freely than a tired, restrictive factory section. It runs from the e-pipe back, so it's a rearward system replacement rather than a full engine-back job.

Will it suit my GU Patrol?

The SSMKNI0107 is listed to fit the Nissan Patrol GU with the 4.5L engine. Patrol GUs ran across a long production span with variations in hangers and routing, so send your exact build through and we'll confirm the pipe path and mounting before you commit.

What does fitting involve at our Illawarra workshop?

Oak Flats Muffler Men supplies and fits this system in-house across the Illawarra. We check the centre muffler and rear hotdog positions against your underbody, confirm clearances over the rear axle, and set the hangers so nothing knocks on flex. Book the bay and we'll have it sorted in a single visit.

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

Common questions

What's the difference between the centre muffler and the rear hotdog on the SSMKNI0107?: The centre muffler is the main chambered silencer that controls volume; the rear hotdog is a compact straight-through resonator that targets drone frequencies on the way out rather than quietening further.
Does the SSMKNI0107 replace the whole exhaust?: No — it runs from the e-pipe back, so it replaces the rearward section of the Patrol GU 4.5L exhaust, not the engine-back pipework. Confirm your exact setup with the workshop.
What pipe size is this system?: It's built to a 2.5in bore, sized for the GU Patrol 4.5L rather than a larger modified engine.

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