
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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Silverado 2500 HD T1, 6.6L TD V8, 2020-2025, 4in-5in Turbo Back With Cat & Without Muffler.
Category: Mufflers and resonators


Keeping the catalytic converter on a full-length turbo-back while deleting the muffler is what sets the MPI Automotive SSMKCH0025 apart. This stepped 4in-to-5in section is listed to fit the Chevrolet Silverado 2500 HD T1 6.6L turbo-diesel V8 (2020–2025).
A turbo-back runs from the turbo outlet rearward — the longest section in this range. The SSMKCH0025 takes that stepped 4in-into-5in run, keeps the catalytic converter, and deletes the muffler. The result opens the note up over a muffled system while leaving the emissions converter in place — the louder choice that still retains the cat.
Because the SSMKCH0025 keeps the catalytic converter, the cat-delete compliance issue doesn't apply to this variant — the converter stays fitted. Deleting the muffler changes the note considerably, so confirm noise levels and any state requirements with the workshop before fitting; emissions hardware is only one part of registration.
It's listed to fit the 2020–2025 Chevrolet Silverado 2500 HD T1 6.6L turbo-diesel V8. Send your build to the workshop so we can confirm the listing against your truck before ordering. The bore figures here are the section's own spec.
Oak Flats Muffler Men supplies and fits this MPI Automotive turbo-back in-house across the Illawarra. We confirm hanger positions on the stepped 4in-5in muffler-free run, check the listed Silverado fitment, and book the bay. The RRP is $6,840.17.
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.