Silverado 2500 HD T1, 6.6L TD V8, 2020-2025, 4in-5in Turbo Back With Cat
MPI AutomotiveRRP$7103.73Silverado 2500 HD T1, 6.6L TD V8, 2020-2025, 4in-5in Turbo Back With Cat & Muffler (SKU: SSMKCH0024) Engineered.
View partSSMKCH0034
Silverado 2500 HD K2, 6.6L TD V8, 2017-2019, 4in-5in Turbo Back With Cat & Without
Silverado 2500 HD K2, 6.6L TD V8, 2017-2019, 4in-5in Turbo Back With Cat & Without Muffler.
BrandMantaMPI Automotive
Category: Mufflers and resonators
RRP $6854.03 AUD
In stock at supplierAfterpay, Zip Pay & Zip Money available
Part specs
- SKU
- SSMKCH0034
- Supplier
- MPI Automotive
- Category
- Mufflers and resonators
- Vehicle fitment
- Chevrolet
- Stock status
- In stock at supplier
This variant keeps the catalytic converter but drops the muffler: the MPI Automotive SSMKCH0034 is a 4in turbo-back that retains the cat and runs without a rear silencer, listed to fit the Chevrolet Silverado 2500 HD 6.6L V8 turbo-diesel (2017–2019). Emissions hardware stays, volume opens up.
What does keeping the cat but losing the muffler do?
The SSMKCH0034 retains the factory catalytic converter — the emissions component that matters most for compliance on a diesel — while leaving out the rear muffler. That gives you a freer-flowing, louder system than a muffled build, because the gas is not passing through a chambered silencer at the back, but it keeps the cat in place. It is the configuration for an owner who wants the open note without deleting the converter.
Is it road legal?
Because the SSMKCH0034 keeps the catalytic converter, it leaves the key emissions hardware the Silverado left the factory with in the system — the usual sticking point on a diesel turbo-back. State noise and compliance rules still apply, and a no-muffler system is louder, so confirm the exact build and any requirements with the workshop before fitting.
What does the 4in bore suit?
A turbo-back runs from the turbo outlet rearward, the full engine-back span. The supplier lists this at a 4in bore, sized for the 2500 HD's 6.6L turbo-diesel V8. With the cat retained and no muffler in the back of the run, the 4in pipe carries the gas through with the converter as the only major device in the path.
What does fitting involve at our Illawarra workshop?
Oak Flats Muffler Men supplies and fits this turbo-back in-house across the Illawarra. We confirm it against your 2017–2019 Silverado 2500 HD, check the 4in routing and how the no-muffler note suits your use, and book the bay once fitment is verified. It is a brought-in item; the listed recommended retail is $6,854.03, which we confirm with you along with availability before ordering.
Stocked and fitted by Oak Flats Muffler Men, the Illawarra exhaust and 4x4 specialist in Oak Flats, NSW.
Common questions
- Does the SSMKCH0034 keep the catalytic converter?
- Yes — this is the with-cat turbo-back, so the factory catalytic converter stays in place. It runs without a rear muffler.
- How loud is it without a muffler?
- With no muffler it is a more open, louder system than the muffled variants, though it keeps the cat. We can't quote a noise figure.
- Will it fit my 2500 HD?
- It is listed to fit the Chevrolet Silverado 2500 HD 6.6L V8 turbo-diesel (2017–2019). Confirm your exact build with Oak Flats Muffler Men before ordering.
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.
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