Cobb

Top Feed 1050X Fuel Injectors

$625.00

SKU: 7105470169263

In Stock
In Stock
Ships by Aug 29
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The Cobb Tuning Top Feed 1050X Fuel Injectors are designed as a direct replacement for factory top-feed injectors in 2007-2021 Subaru WRX STI models equipped with the EJ257 engine and top-feed fuel rail. This set of four injectors delivers a substantial flow rate of 1050cc/min, providing ample fueling capacity for high-power engine builds. As power levels increase, factory injectors can reach their duty cycle limits (80-85%), leading to inconsistent fueling and lean conditions. The 1050X injectors offer increased flow headroom, reducing injector duty cycle and ensuring more reliable fuel delivery, especially critical during forced induction modifications. These injectors are characterized, meaning their flow rates and spray patterns are precisely measured and published. This data is integrated into Cobb's Accesstuner software, allowing a ProTuner to create a custom calibration tailored to the specific behavior of these injectors. The set includes o-rings and installation hardware.

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

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandCobb
Part Number7105470169263
CategoryAir and Fuel

We’re here — turning wrenches, just like you.

Call us, follow along, or come say hi.

(760) 282-4645 Instagram Google

Buy with Confidence

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.

View Full Return Policy

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.

View Full Shipping Policy