Napier · Turbocharger

Napier NA357 Spare Parts

Genuine and Alang-reconditioned spare parts for the Napier NA357 marine exhaust-gas turbocharger — medium-speed 4-stroke marine main engines, power generation, rail. Shipped from Bhavnagar, India to any port worldwide.

Parameter	NA357
Maker	Napier
Model	NA357
Equipment	Marine exhaust-gas turbocharger
Power	Up to ~6.5 MW (6,500 kW) per turbocharger
Pressure ratio	4.8:1
Application	Medium-speed 4-stroke marine main engines, power generation, rail
Production years	1998 – present

Figures as published for the NA357. Where a figure is not in a source we hold, this page says “not published to us” rather than estimating it. Send your equipment and part number and we confirm against the nameplate before quoting.

NA357 Spare Parts We Supply

Rotor shaft with turbine wheel
Compressor wheel / impeller
Nozzle ring
Journal bearings
Thrust bearing
Complete cartridge / rotor assembly
Labyrinth and seal rings
Diffuser
Gas inlet and outlet casing
Silencer and air filter element
Bearing bush and sleeve
O-rings, gaskets and fasteners

Genuine, OEM-equivalent and Alang-reconditioned. Every reconditioned part is measured against the maker’s limits before it leaves us. If your part is not listed, send the part number — most Napier items are sourceable through the yard.

About the Napier NA357

The Napier NA357 is a marine exhaust-gas turbocharger. Built 1998 – present. Application: Medium-speed 4-stroke marine main engines, power generation, rail

Source: our Turbocharger spec research file (turbocharger/03-napier.md).

Why Source NA357 Parts from Wattmare?

We are in Bhavnagar, next to Alang — the world’s largest ship-recycling yard, and where reconditioned marine parts actually come from. We hold fast-moving items, source the rest through the yard and our trader network, and dispatch worldwide in 24–48 hours on emergency orders.

Salim Dholia
Wattmare · Bhavnagar / Alang, India

View All Napier Models

All Napier spare parts Turbocharger spare parts Reconditioned parts Alang ship spares 24–48hr emergency

Frequently Asked Questions

What Napier NA357 spare parts do you supply?

Genuine, OEM-equivalent and Alang-reconditioned parts for the NA357, including rotor shaft with turbine wheel, compressor wheel / impeller, nozzle ring, journal bearings, thrust bearing. Send the part number for anything not listed.

What is the delivery time for NA357 parts?

Stock items dispatch the same or next working day from Bhavnagar. Emergency orders ship in 24–48 hours to any major port. Sourced items depend on the yard — we confirm a real date before you commit.

Are your NA357 parts genuine or reconditioned?

Both. We supply genuine and OEM-equivalent new parts, and Alang-reconditioned parts measured against the maker's limits before dispatch. We tell you which you are buying — we do not sell reconditioned as new.

Need NA357 parts?

Send the equipment number and part number. We quote with a real availability date, not a maybe.

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