WEILEITE Fuel Injector for HiSun EFI UTV/ATV 2-Hole — Direct-Fit Replacement (2011–2018), Corrosion-Resistant

WEILEITE 2-hole fuel injector is a direct-fit replacement for select 2011–2018 HiSun EFI UTVs, ATVs and utility tractors, restoring precise fuel delivery and reliable engine performance.

This injector is engineered as a factory-tested replacement part that meets or exceeds OEM specifications for HiSun EFI models and compatible brands listed. It’s built from reinforced materials to resist high temperatures and corrosion, designed for accurate atomization and a wide dynamic flow range. Before purchasing, verify your vehicle’s part number to ensure compatibility.

Which vehicles and part numbers does this injector fit?

This WEILEITE injector is intended for engines used in several small off-road and utility vehicles produced between 2011 and 2018. It replaces common OEM references so you can match it against service parts lists.

• Compatible models: HiSun EFI UTV/ATV 450, 500, 550 and equivalents
• Also fits: Massimo, TSC, MSU, YS, Cowboy, Bennche, Coleman, Cub Cadet tractors
• OEM cross-references: 28160355, 16400-004C-0000, 16400-004-0000
• Always check your vehicle’s part number and connector style before ordering

How does this injector improve engine performance?

The injector delivers metered fuel in a finely atomized spray to the intake/tracks, improving combustion consistency and throttle response when installed correctly. That helps minimize rough idling and hesitation caused by worn or clogged injectors, without altering engine tuning.

• Precision metering reduces fuel variance between cylinders
• Good atomization supports cleaner combustion and smoother idle
• Wide dynamic flow range handles idle to high-load demands
• Reinforced materials resist heat and corrosion for longer life

What should I expect during installation and maintenance?

Installation is straightforward for anyone familiar with basic fuel-system work: the injector is designed as a direct replacement to match original mounting and connector locations. Regular fuel-system maintenance—clean fuel, filters, and scheduled inspections—will extend the service life of the injector.

• Direct-fit design for bolt-in replacement with OEM connections
• Factory-tested to match original flow characteristics
• Recommended: replace fuel filter and inspect seals during installation
• Keep ethanol content and fuel cleanliness controlled to reduce clogging

What warranty and support does WEILEITE provide?

WEILEITE stands behind this new, factory-tested part with customer support and a lifetime warranty promise for quality issues. If you encounter defects or questions, contact the seller directly; they commit to responding to inquiries and resolving after-sales problems.

• Product arrives brand-new and factory-tested
• Lifetime warranty for manufacturing defects
• Customer support aimed at timely resolution of issues
• Return or replacement options available when problems are verified

Who is this for: This WEILEITE 2-hole fuel injector is intended for owners, mechanics and fleet operators of HiSun EFI UTVs/ATVs (450–550) and compatible small tractors who need a reliable, OEM-spec replacement. It’s a practical option for anyone restoring engine performance after injector wear, replacing a failed injector, or maintaining older off-road and utility vehicles where correct fuel metering is essential.