Manta Exhaust - Chevrolet Silverado 2500 HD 6.6L L5P Duramax Turbo Diesel V8 Ute 2020-2025

The L5P Duramax is the best thing about a Silverado HD, and the factory exhaust is the worst. Everything behind the turbo is sized for emissions compliance rather than airflow, and you feel it the moment there is a van behind you. This is Manta's Australian-built answer, in DPF back and turbo back, finished with a 5in tailpipe.

Choosing your system

• DPF Back Side Exit — from the diesel particulate filter back, exiting out the side. The factory DPF and all the emissions gear stay untouched, so the truck remains road legal and the warranty position is unchanged.
• Turbo Back with Cats — everything behind the turbo with a catalytic converter retained, so the truck stays road legal.
• Turbo Back — everything behind the turbo. The biggest single restriction on the Duramax is the factory pipework right off the turbo, so this is the change you feel in the towing range.

The Turbo Back option does not retain a catalytic converter and is sold for off-road and competition use. Removing emissions equipment from a road-registered vehicle is not legal in any Australian state. If the truck is registered and driven on the road, choose the Turbo Back with Cats or the DPF Back.

409 stainless throughout. These are big systems that live under a truck doing serious kilometres, and stainless is the only sensible way to build them.

How loud do you want it

• Quiet — the most muffling Manta offers on this platform. Deeper and fuller than factory, but still a truck you can drive to work every day.
• Medium — the middle setting, and the one most owners land on. You get the V8 note under load without it droning at you on a long tow.
• Loud — straight through. Unmistakable, and you will hear it at cruise. Pick it because you want to.

Before you order

2020-2023 DPF Back needs no tune. Turbo Back on 2020-2023, and both configs on 2024-2025, require a tune.

Fitment

Chevrolet Silverado 2500 HD, L5P Duramax, 2020 to 2025. Bolts to the factory mounting points and uses the standard hangers.

5in tailpipe, mandrel-bent throughout. A mandrel bend holds its full diameter around the corner instead of crushing down the way press-bent tube does, which is the whole point of fitting a bigger system.

Manufactured in Australia by Manta Performance Exhausts. These are large, heavy systems, so get in touch before you order if you want a delivered price to your address, or if you are not sure which configuration suits your truck.