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COBB Tuning

Top Feed 1050X Fuel Injectors

Name: Top Feed 1050X Fuel Injectors
Brand: COBB Tuning
SKU: 312150
Price: 625.00 USD
Availability: InStock

$625.00

SKU: 312150

Special Order

Ships in 4–6 weeks

Free Shipping over $200

$100 Minimum Order

30 Days Return

Description

The COBB Tuning Top Feed 1050X Fuel Injectors are engineered to support high-power Subaru STI builds that have outgrown the capacity of stock fuel injectors. Featuring a 1050cc/min flow rate, these injectors provide ample headroom, significantly reducing injector duty cycle under high power conditions and thus preventing potentially damaging lean fuel conditions. These injectors are designed as a direct replacement for factory top-feed fuel rails. The set includes four injectors, along with necessary o-rings and installation hardware. A critical aspect of these injectors is their characterized data, which is precisely measured for flow rates and spray patterns. This data is integrated into COBB's Accesstuner software, enabling professional tuners to create accurate and safe custom calibrations. It is essential to note that the COBB Tuning Top Feed 1050X Fuel Injectors REQUIRE a ProTuner custom calibration and are NOT compatible with Off-The-Shelf (OTS) maps designed for factory injector flow rates. Proper tuning is necessary to maintain stock idle characteristics and drivability.

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

Brand	COBB Tuning
Part Number	312150
Category	Air 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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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