Mosselman BMW N54 Upgraded Stage 2 Turbochargers MSL50-65 For BMW 135i, 335i & Z4 35i/is

The Mosselman Upgrade Turbocharger Set (MSL50-65) for the BMW N54 engine delivers a substantial increase in performance while retaining excellent drivability and long-term reliability. Designed as a true plug-and-play solution, this turbo set integrates MHI TD04 cartridges into a layout engineered specifically for the N54 platform, allowing significant power gains without compromising installation simplicity or consistency.

Depending on supporting modifications and fuel type, the MSL50-65 turbocharger set is capable of producing up to 650hp*. It is a proven upgrade for enthusiasts seeking a strong step up from stock turbos while maintaining predictable response and dependable operation.

The set is based on brand-new MHI N54 turbochargers, enhanced with multiple Mosselman-designed components to ensure precision, durability, and repeatable performance. Manufactured in-house at Mosselman’s HQ in the Netherlands, each turbocharger is VSR balanced and finished to the highest standards. Thanks to their OEM origins, installation is fully plug-and-play with no additional modification required. Every set is supplied with a limited 1-year Mosselman warranty.

Key Features

• Performance capability of up to 650hp*

• Based on brand-new MHI N54 turbochargers

• Integrated MHI TD04 cartridge design

• High-precision CNC machined housings

• VSR balanced for smooth, reliable operation

• Titanium shaft nut

• Manufactured in-house at Mosselman HQ (Netherlands)

• True plug-and-play installation

• Extremely low core charge (where applicable)

*Power figures depend on supporting modifications and fuel type.

Compatible Vehicles

Available for left-hand drive and right-hand drive vehicles (selection required before checkout).

• BMW E8X 135i

• BMW E9X 335i

• BMW Z4 35i

• BMW Z4 35is

Core Charge Options – Important Information

This product is available with two purchase options. Selecting the correct option at checkout is essential to avoid delays, order clarification, or additional charges.

Option 1: No Core Charge

Only select this option if:

• You have already sent your original N54 turbochargers to us in advance, or

• You are physically dropping off your turbochargers at our facility and collecting the upgraded set in person

In short, this option is only valid when we already have your original turbochargers in our possession at the time of order.

If your original turbos are not already with us, do not select this option. Selecting it incorrectly will delay the order while the issue is resolved.

Option 2: With Core Charge (Refundable)

Select this option if:

• You are not sending your turbochargers to us in advance, and

• You want to receive the Mosselman upgraded turbo set first, then return your original units afterwards

A core charge is applied at checkout. Once your original turbochargers are returned and approved as usable cores by Mosselman, the core charge will be refunded in full.

We must receive your original turbochargers within 90 days of purchase to be eligible for the refund.

This option allows you to minimise vehicle downtime by installing the upgraded turbos first and returning the originals later.

Core Charge Disclaimer

• Core charges are refundable only after original turbochargers are returned

• Returned units must be complete and in usable condition

• All cores are subject to inspection and approval by Mosselman

• Selecting the correct option at checkout is the customer’s responsibility

If you are unsure which option applies to your situation, please contact us before placing your order.

Returns Policy Notice

Please note: Due to complex logistics and the bespoke nature of the product, all Mosselman turbocharger sets are non-refundable and excluded from our returns policy.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.