Upgraded 4 Holes Fuel Injectors for Chevy Silverado/GMC - Improved

In this review of the Upgraded 4 Holes Fuel Injectors, the bottom line is simple: these injectors are for owners of 2010-2014 GM trucks and SUVs with 4.8L, 5.3L or 6.0L FLEX engines who need a direct replacement set of eight injectors that aim to restore smooth idle and consistent throttle response. The reviewer found the 4-hole design promotes even fuel distribution across cylinders and that the kit, sold as a complete 8-piece set, is intended as a practical repair for vehicles showing rough idling, reduced acceleration, or inconsistent fuel economy.

Key Features

• Direct fit replacement: Designed to replace OEM part numbers such as 12613411 and FJ1061, making installation straightforward for compatible GM engines.
• Four-hole nozzle: The 4-hole tip aims to deliver a more even spray pattern for improved combustion and smoother idling after installation.
• Complete kit: The package includes 8 fuel injectors, allowing full-bank replacement for better balance and consistent performance across all cylinders.
• Wide compatibility: Fits a broad range of Chevy, GMC, Cadillac and Hummer models from 2010 to 2015 with 4.8L, 5.3L and 6.0L FLEX engines, reducing the guesswork about fitment.
• After-sales support: The brand provides professional after-sales contact by email to address failures, cracks or other problems, offering practical peace of mind.

Who It's For

This set is aimed at DIY mechanics and independent shops working on late-model GM trucks and SUVs who prefer to replace all injectors at once to restore even performance. It is particularly suited to owners of Silverado 1500, Sierra 1500, Tahoe, Suburban, Yukon, Avalanche and Express models from the 2010-2014 era with the listed engine sizes.

It is less appropriate for vehicles outside the stated model years or engines, for owners looking for OEM-branded parts, or for projects that require custom calibration or high-performance injectors beyond stock flow rate and spray pattern characteristics.

Pros & Cons

Pros

• Complete 8-piece kit makes full-bank replacement easy and helps restore balanced engine performance.
• 4-hole design provides a more uniform spray for smoother idle and improved throttle response.
• Matches common OEM part numbers for confident fitment across many GM models and engines.
• Brand offers after-sales support for defective units or fitment issues.

Cons

• Not an OEM-branded injector, so users seeking factory-labeled parts may prefer dealer replacements.
• Fitment is limited to the specific GM model years and engine types listed, so verification is required before purchase.

Specifications

Brand	AZQOP
Package	8 Pcs fuel injectors
Compatible Engines	4.8L, 5.3L, 6.0L FLEX engines
Compatible Years	2010-2015 (model-dependent)
Replaces Part Numbers	12613411, FJ1061, 217-3411, 67668 and others
Nozzle Type	4-hole spray

Our Verdict

These injectors are a practical, cost-conscious option for owners of the specified GM trucks and SUVs who need a full set replacement to recover smooth idling and consistent acceleration. The 4-hole design and complete 8-piece package make them a sensible choice for DIYers and independent shops; buyers who require OEM-branded parts or operate outside the listed fitment should consider alternatives.

Frequently Asked Questions

Do these injectors fit a 2011 Silverado 5.3L?
Yes, the set lists compatibility with 5.3L Silverado 1500 models from 2010 to 2013 and is intended as a direct replacement for that application.

How many injectors are included?
The package includes 8 fuel injectors, allowing for complete replacement of a V8 engine bank.

What if an injector fails after installation?
The seller offers professional after-sales support via email to address failures, cracks or nonfunctioning units.