Cobb Subaru Top Feed 1050X Fuel Injectors-COBB-COBB312150
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Cobb Subaru Top Feed 1050X Fuel Injectors

COBB
COBB312150
700424675418
Fuel Injector Sets - 4Cyl
20+ Units In Stock - Ships Next Business Day
$ 625.00
$ 625.00

SKU: B312150   |   UPC: 700424675418

COBB 1050x Top-Top-Feed Fuel Injectors (Set of 4) – Subaru WRX/STI/FXT/LGT (All EJ & FA20 2002-2021)

The COBB 312150 1050x set delivers 1050 cc/min flow at 43.5 psi for Subaru EJ20/EJ25 (WRX, STI, Forester XT, Legacy GT) and FA20DIT (2015-2021 WRX) engines. These injectors provide precise atomization and linearity up to 95% duty cycle, powering 500-600+ whp on E85 or 650+ whp on race gas. Direct plug-and-play installation uses the factory harness with full Accessport calibration data included.

Key Features

  • 1050 cc/min @ 43.5 psi: True measured flow rate (1100 lb/hr equivalent) for reliable high-horsepower fueling.
  • Smooth Idle & Part-Throttle: Maintains consistent performance without stumbling, even on E85 blends.
  • Plug-and-Play Fit: Top-feed design with 11 mm bore and USCAR connector matches Subaru factory setup—no adapters required.
  • Full Data Included: Characterization sheets enable seamless Accessport off-the-shelf or custom tuning.
  • Made in USA: Flow-matched set with lifetime warranty against defects.

Product Notes

  • Fits all top-feed EJ20/EJ25 and FA20DIT Subarus—no modifications needed.
  • Replace o-rings with new ones and use assembly lube for leak-free operation.
  • Fully insured shipping in official COBB box with foam protection.

Installation Notes

  • Professional installation recommended.
  • 30-minute DIY: Remove fuel rail, swap injectors, reinstall with new o-rings.
  • Requires Accessport with 1050x map for tuning—OTS maps available from COBB.

This Part Fits

Year Make Model Submodel
2002-2021 Subaru Impreza WRX
2004-2021 Subaru Impreza STI
2015-2021 Subaru WRX Base / Premium
2004-2013 Subaru Forester XT
2005-2009 Subaru Legacy GT
2005-2009 Subaru Outback XT

Why Choose COBB?

  • Proven reliability in Subaru tuning community for over 10 years.
  • Every set individually flow-tested and data-logged in the USA.
  • Powers all COBB Protune record holders from 600-1000+ whp.

Frequently Asked Questions

  • Q: Will these fit my 2018 STI?
    A: Yes, direct drop-in for all EJ25 top-feed and FA20DIT WRX/STI models 2002-2021.
  • Q: Do I need a tune?
    A: Yes, pair with COBB Accessport—free 1050x off-the-shelf maps provided.
  • Q: What about warranty?
    A: Lifetime against defects, backed by US manufacturing and rigorous testing.

Shipping & Handling

  • Method: UPS/FedEx Ground – fully insured
  • Availability: In stock - ships same or next business day
  • Packaging: Official COBB box with foam inserts (9 x 7 x 3 inches)
  • Weight: 1.65 lbs

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