
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-5in Turbo Back Without Cat & With Muffler.
Category: Mufflers and resonators


A cat-delete turbo-back that keeps a muffler is what defines the MPI Automotive SSMKCH0026 — the more tempered of the full-length stripped builds. This stepped 4in-to-5in section is listed to fit the Chevrolet Silverado 2500 HD T1 6.6L turbo-diesel V8 (2020–2025).
No. The SSMKCH0026 deletes the catalytic converter on a road-relevant turbo-back exhaust, so it is not ADR 79/04 compliant for road registration in NSW and is intended for off-road use only. Retaining the muffler tempers the note, but the cat delete makes this an off-road part regardless — there's no softening it.
Unlike the fully-stripped version, the SSMKCH0026 keeps a muffler in the stepped 4in-into-5in run. That holds the note down while the cat is removed, so it's the quieter of the no-cat turbo-back options — for an off-road Silverado owner who wants the big-bore flow without the harshest tone. The bore figures here are the system's own spec, sized for the diesel V8.
It's listed to fit the 2020–2025 Chevrolet Silverado 2500 HD T1 6.6L turbo-diesel V8. Send your exact build to the workshop so we can confirm the listing against your truck before ordering this off-road section.
Oak Flats Muffler Men supplies and fits this MPI Automotive turbo-back in-house across the Illawarra. As a cat-delete off-road build, we'll confirm intended use, check hanger points on the stepped run and the listed Silverado fitment, then book the bay. The RRP is $6,713.23.
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.