Lisle Injector Seal Installer Kit — 11-piece Teflon injector seal toolset, fits 6mm & 7.5mm stems, pilot cones & sizer

When servicing fuel injectors on modern Ford, GM and Subaru engines, replacing the small Teflon O-ring seals correctly prevents leaks and ensures reliable injector fitment. This kit provides pilot cones, installers and a sizer to guide the seal onto the injector stem and compress it to the proper outside diameter before reinstallation into the cylinder head. It fits common 6mm and 7.5mm injector stems and covers many Ford ECO injectors plus a wide range of GM and Subaru direct-injection applications.

Which engines and injector types does this kit work with?

The Lisle 11-piece kit is designed for many modern direct-injection systems. It supports Hitachi, Bosch, Continental and Delphi style injectors used across late-model Ford, GM and Subaru engines. Check injector stem diameter and application years to confirm fit.

• GM: 2010 and newer families including 1.4L–6.2L engines and specific 2010–2017 models
• Subaru: 2014–2019 2.0L and 2.4L turbo applications
• Ford: many 2011 and later injectors including select ECO injectors
• Fits injector stems sized 6 mm and 7.5 mm

How do the pilot cone, installer and sizer work together?

The process uses three complementary tools to guide, press and restore the seal to the correct diameter. The pilot cone leads the seal onto the injector tip without twisting or nicking it. The installer pushes the seal down into position, and the sizer compresses the seal back to the needed outside diameter for cylinder-head installation.

• Pilot cone: centers and starts the seal on the stem safely
• Installer: pushes the seal fully into the injector groove
• Sizer: compresses the seal to the correct OD for head installation

What are the concrete benefits of using this specialized kit?

Using the right tools reduces the chance of cutting or misplacing delicate Teflon seals, speeds up service time and helps ensure a leak-free reinstallation. The kit’s parts are shaped to match typical direct-injector geometry so seals seat consistently and install straight every time.

• Prevents seal damage during installation and avoids rework
• Speeds injector servicing on bench or engine
• Compatible with a broad range of common injector manufacturers

How should I verify fit before starting a job?

Confirm the injector manufacturer and stem diameter, and compare the Teflon seal profile to those the kit is intended for. If uncertain, test-fit a spare seal on the kit’s pilot cone and sizer before working on the vehicle to avoid in-service damage.

• Inspect injector stem diameter (6 mm or 7.5 mm) and seal shape
• Reference vehicle year and engine family for compatibility
• Trial-fit on a spare seal to confirm tool geometry

Who this is for: The Lisle Injector Seal Installer Kit is intended for professional technicians, independent shops and skilled DIYers who rebuild or service fuel injectors on modern Ford, GM and Subaru engines. If you routinely replace Teflon injector seals and require accurate, repeatable installation without damaging delicate seals, this kit saves time and reduces installation errors.

• Includes 11 pieces covering pilot cones, installers and sizer tools
• Works with many Ford ECO injectors and common direct-injection systems
• Designed for 6 mm and 7.5 mm injector stems