WOTUPHJI Fuel Injector Spacer Set 8pc — Aluminum Spacers & High-Temp O-Rings for LS1/LS6

WOTUPHJI Upgrade Fuel Injector Spacer Set is an 8-piece adapter kit that lets short LS truck fuel injectors fit precisely into taller LS1/LS6 intake manifolds and fuel rails.

When swapping intake manifolds or upgrading injectors on LS-series engines, mismatched injector heights can cause poor seating, leaks, or alignment issues. The WOTUPHJI spacer kit includes eight precision-machined aluminum spacers and high-temperature rubber O-rings designed to restore correct injector length and create a reliable, leak-resistant seal without modifying the engine or fuel rail.

How does this spacer set solve injector fitment problems?

The spacers add measured length between the injector top and the fuel rail to accommodate taller LS1/LS6 manifolds. They remove the need for custom machining by restoring OEM-style geometry and stable injector retention.

• Precision-machined aircraft-grade aluminum spacers for consistent thickness.
• Reinforced high-temp rubber O-rings to prevent fuel seepage under heat.
• Designed to match factory spec part# 551371 for plug-and-play compatibility.

What materials and construction make the kit durable?

The kit combines corrosion-resistant aluminum with heat-resistant rubber seals to withstand engine-bay temperatures and constant vibration. Each spacer is finished for smooth seating while the O-rings are formulated to retain elasticity and sealing ability over time.

• Aircraft-grade aluminum resists warping and corrosion.
• High-temperature rubber O-rings maintain compression and sealing.
• Quality control inspection on every kit to ensure consistent parts.

Will installation be straightforward for a DIY mechanic?

Yes — the kit was engineered for straightforward installation with factory-style dimensions. Most technicians can install the spacers during a routine injector or intake service without special tools; torque specs and basic fuel-system precautions still apply.

• Eight spacers and O-rings included for all injector positions.
• Fits LS truck injectors to LS1/LS6 manifolds with OEM-spec alignment.
• No engine modification required; follow fuel-system safety steps.

What warranty and testing support the product?

Each kit undergoes inspection to meet fit and finish expectations, and the manufacturer backs the product with a one-year guarantee. The warranty gives added confidence in long-term stability and replacement coverage if defects arise under normal use.

• Manufactured to OEM-spec part# 551371 tolerances.
• Quality-tested components and fit validation prior to shipping.
• One-year warranty for parts and workmanship coverage.

Who is this for? WOTUPHJI's 8-piece injector spacer kit is aimed at automotive enthusiasts, professional mechanics, and anyone performing intake swaps or injector upgrades on LS-series engines who needs a reliable, factory-dimension adapter. If you're fitting shorter truck injectors into LS1/LS6 intake setups and want a durable, leak-resistant solution that avoids machining or custom adapters, this kit provides an OEM-style fit and simple installation.