
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 T1, 6.6L TD V8, 2020-2025, 4in T/ Back, Suits OEM Tailpipe, Without Cat & Muffler.
Category: Mufflers and resonators


Deleting both the cat and the muffler while keeping the OEM tailpipe is what marks the MPI Automotive SSMKCH0032. This 4in turbo-back section is listed to fit the Chevrolet Silverado 2500 HD T1 6.6L turbo-diesel V8 (2020–2025) and bolts up to the factory tailpipe.
No. The SSMKCH0032 deletes the catalytic converter on a road-relevant exhaust, so it is not ADR 79/04 compliant for road registration in NSW and is intended for off-road use only. With both the cat and the muffler removed, this is a build for competition or private property, not a registered Silverado.
This section is designed to mate to the factory Silverado tailpipe rather than supply a new one. That keeps the rear exit looking standard at the bumper while the upstream 4in run is opened right up — no cat, no muffler. It's the most free-flowing of this turbo-back family, so the note will be loud and unmuffled by design.
It's listed to fit the 2020–2025 Chevrolet Silverado 2500 HD T1 with the 6.6L turbo-diesel V8. Because it's built to suit the OEM tailpipe, send your exact build to the workshop so we can confirm the listing and tailpipe interface against your vehicle before ordering.
Oak Flats Muffler Men supplies and fits this MPI Automotive section in-house across the Illawarra. As a no-cat, no-muffler off-road build, we'll confirm intended use and the OEM tailpipe connection, check the listed Silverado fitment, and book the bay. The RRP is $3,716.17.
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.