Is the MKNI0068 road legal in NSW?

No — it removes the catalytic converter on a full road-relevant system, so it is not ADR 79/04 compliant for road registration in NSW and is for off-road use.

What's the muffler arrangement?

It uses a centre hotdog and a rear hotdog — two free-flowing straight-through resonators rather than chambered mufflers.

Yes — it replaces the exhaust as a complete run, and it does so without a catalytic converter.

MKNI0068

Nissan Patrol GU 4.5L Full System - No Cat - with Centre & Rear Hotdog

Nissan Patrol GU 4.5L Full System - No Cat - with Centre & Rear Hotdog.

BrandMantaMPI Automotive

Category: Mufflers and resonators

RRP $1882.18 AUD

In stock at supplier

Request fitted quote Call the workshop

Afterpay, Zip Pay & Zip Money available

Nissan Patrol GU 4.5L Full System - No Cat - with Centre & Rear Hotdog product image

Part specs

SKU: MKNI0068
Supplier: MPI Automotive
Category: Mufflers and resonators
Vehicle fitment: Nissan
Stock status: In stock at supplier

The MPI Automotive MKNI0068 is a full no-cat exhaust system for the Nissan Patrol GU 4.5L, running a centre and a rear hotdog. Because it removes the catalytic converter on a road-relevant system, it is not ADR 79/04 compliant for road registration in NSW and is intended for off-road use.

What does a no-cat full system mean for road use?

This system replaces the exhaust as a complete length and runs without a catalytic converter, removing the emissions hardware the GU Patrol left the factory with. That makes it not ADR 79/04 compliant for road registration in NSW; it's intended for off-road, competition or private-property use where road compliance isn't required, and we won't soften that. The cat delete is the defining feature of this listing.

Why two hotdogs instead of mufflers?

The MKNI0068 uses a centre hotdog and a rear hotdog — two compact straight-through resonators rather than chambered mufflers. Hotdogs flow more freely and trim harshness rather than heavily silencing, so combined with the cat delete this is the freest-flowing of the GU full-system layouts, which is why it's pitched at off-road use.

Will it suit my Nissan Patrol GU 4.5L?

It's listed to fit the Nissan Patrol GU with the 4.5L engine. The supplier doesn't publish a diameter for this listing, so pipe size is confirmed at fitting; given the GU's long production, confirm your exact build with the workshop first.

What does fitting involve at our Illawarra workshop?

Oak Flats Muffler Men supplies and fits this full system in-house across the Illawarra. Because it's a no-cat off-road system, we confirm the intended use and the exact GU build, then check every hanger and clearance before booking the bay.

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

Common questions

Is the MKNI0068 road legal in NSW?: No — it removes the catalytic converter on a full road-relevant system, so it is not ADR 79/04 compliant for road registration in NSW and is for off-road use.
What's the muffler arrangement?: It uses a centre hotdog and a rear hotdog — two free-flowing straight-through resonators rather than chambered mufflers.
Is it a full system?: Yes — it replaces the exhaust as a complete run, and it does so without a catalytic converter.

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