B58 Turbo Inlet For BMW M240i, 340i, 440i (Gen1 F Chassis)

The ARM B58 Turbo Inlet significantly enhances turbo performance for the Gen 1 B58 engine by increasing the turbo inlet diameter by 25% compared to the factory unit. A standout feature of the ARM B58 Inlet is its 2.5” inside diameter at the turbo snout—substantially larger than the OEM's 2.0” diameter—resulting in a substantial improvement in airflow.

By eliminating the factory sound mufflers, the ARM Turbo Inlet reduces air turbulence and promotes a smoother, more consistent flow into the compressor turbine. This results in faster turbo spool, improved throttle response, and increased power and torque across the powerband.

Designed as a direct-fit upgrade, the ARM B58 Turbo Inlet includes all necessary hardware to maintain full compatibility with OEM fittings.

PREMIUM CONSTRUCTION

Engineered for both performance and reliability, the ARM B58 Turbo Inlet begins with a CNC-machined aluminum fitting that integrates seamlessly with the OEM O-ring and C-clip, ensuring a secure and leak-free connection at the turbo snout.

The inlet body is constructed from 6-layer reinforced high-temp silicone, built to withstand extreme engine bay temperatures and maintain structural integrity.

At the intake side, the inlet expands to a 3.75" inner diameter, and includes a precision adapter for use with either the OEM intake or the ARM B58 Intake system, which maintains a full 3.75" diameter to the air filter for optimal airflow.

INCLUDED IN THE BOX

• ARM Turbo Inlet Body

• ARM Turbo Snout Adapter

• ARM Intake Adapter

• ARM PCV Adapter

• (5x) High-Strength Clamps

HIGHLIGHTS

• 25% Larger Diameter Than OEM

• Enhanced Airflow Efficiency

• 6-Layer Reinforced High-Temperature Silicone

• Precision CNC-Machined Adapters

FITMENT GUIDE

Compatible with Gen 1 B58 Engines
Applicable BMW models include:

Handling

Orders shipped directly from our warehouse are usually processed the same business day if placed before 12 PM MST, and tracking details are provided within 1 business day.

For drop-shipped items, processing times may vary depending on the manufacturer, typically 3–5 business days. Tracking updates may take longer in such cases.

Expedited shipping applies only once the item is ready to ship.

Return

You have 30 days after receiving your order to request a return. Items must be unused, in original packaging, and include proof of purchase. Customers are responsible for covering the return shipping costs.

To start a return, email us at sales@palenonperformance.com. Returns sent without approval will not be accepted.

You can request a return directly from your account by selecting the return option on your order page. Here is the URL: https://shopify.com/55092379855/account/orders

Non-returnable items:

• Burger Motorsports (BMS) products
• Used items
  
• Air Intakes
• Hazardous materials, flammable liquids, or gases
• Discounted items and gift cards other than "PALENON PERFORMANCE" brand 

Exchanges

Return the item and place a new order once approved.

Refunds

Approved refunds are issued to the original payment method. A restocking fee is 20% will be applied. Processing time depends on your bank or payment provider. The original shipping cost will not be refunded.

Cancellations

Canceled orders are subject to a 5% merchant fee (8% for Shop Pay installments). Custom, specialized items or pre-order items canceled within their lead time are also subject to this fee. Will also incur a 10% restocking fee.

Damaged or incorrect items

Inspect your order upon arrival and contact us immediately for assistance. If the wrong part was ordered, customer covers return shipping.

Disputes / Chargebacks

Our legal team is fully prepared to take stringent action against you for filing a baseless claim and initiating a fraudulent chargeback. This will lead to civil or criminal proceedings, which would require you to engage with our attorneys in our jurisdiction.

It is crucial to understand that filing a false chargeback is a serious offense, punishable by substantial fines or imprisonment. Potential penalties for fraudulent chargebacks can include one to three years in prison and fines ranging from $1,000 to $10,000. We treat all chargebacks with the utmost seriousness, regardless of the amount, as this is classified as a felony.

We will compose all necessary information to send your account to a collections agency and request that you be served once our lawyers organize the evidence and file a case against you.