Spool Performance

IFX350 30% Flow Increase Direct Injection Injectors

$1,999.00

SKU: SP-INJ-S581

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The Spool Performance IFX350 Upgraded DI Injectors are designed to enhance the fuel delivery system for the BMW S58 engine platform. These injectors provide a significant +30% increase in flow rate compared to the factory units, allowing for increased fuel delivery to support higher performance levels. Engineered for direct integration with the S58's factory direct injection system, the IFX350 injectors are built to maintain smooth idle and optimal low-load behavior. This ensures that while performance is increased, the engine's overall integrity and drivability are not compromised. These injectors are compatible with E85 fuel and are suitable for various BMW models equipped with the S58 engine, including the G80 M3, G82 M4, G87 M2, X3M, and X4M. They are part of Spool Performance's commitment to providing high-flow, high-pressure fuel injectors for demanding applications.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandSpool Performance
Part NumberSP-INJ-S581
CategoryAir and Fuel

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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