
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.
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MPI Automotive Silverado 2500 HD K2, 6.6L TD V8, 2017-2019, 4in-5in Turbo Back With Cat & Muffler.
Category: Mufflers and resonators


This is the keep-everything variant of the Silverado family: the MPI Automotive SSMKCH0033 is a 4in turbo-back that retains both the catalytic converter and a rear muffler, listed to fit the Chevrolet Silverado 2500 HD 6.6L V8 turbo-diesel (2017–2019). Cat in, silencer in — the most restrained build of the four.
The SSMKCH0033 keeps the factory catalytic converter and runs a rear muffler, so it changes the pipe sizing from the turbo back without stripping the emissions hardware or the silencing. On the big 6.6L turbo-diesel V8 that means a fuller note than stock while staying the most civilised of the family — the chambered muffler reflects and absorbs sound at the back, and the cat stays in the path. It is the turbo-back for an owner who wants the bigger-bore system but the quietest result of the set.
Because the SSMKCH0033 keeps the catalytic converter, it retains the emissions equipment the Silverado left the factory with — the part that matters most for road compliance on a diesel. State noise and registration rules still apply to any modified system, so confirm the exact build and any requirements with the workshop before fitting.
A turbo-back replaces the exhaust from the turbo outlet rearward, the full engine-back run. The supplier lists this at a 4in bore, sized to the 2500 HD's 6.6L turbo-diesel. Both the cat and the muffler sit inside that 4in run, so the gas passes through the converter and the silencer on its way out — the fullest-equipped configuration of the four.
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, cat and muffler clearance, and book the bay once fitment is verified. It is a brought-in item; the listed recommended retail is $6,343.63, 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.
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.