Standard Ignition SK66 Fuel Injector Seal Kit

Fuel Injector Seal Kit for OE-Style Service

Standard Ignition SK66 is a fuel injector seal kit built for injector service on select GM heavy-duty trucks. It is designed around OE specifications and tested in an ISO 9000-compliant environment for consistent sealing performance.

Compatible with 2001-2004 Chevrolet Silverado 2500 HD, 2001-2004 Chevrolet Silverado 3500, 2001-2004 GMC Sierra 2500 HD, and 2001-2004 GMC Sierra 3500 applications that use the listed injector seal configuration.

• Brand: Standard Ignition
• Part number: SK66
• Fuel injector seal kit for one injector service
• Black and copper seal materials
• Includes 2 O-rings
• Hardware included: Yes
• Nozzle seal included: No
• Pintle cap included: No
• Upper intake manifold gaskets included: No
• O-ring dimensions: 21.082 mm inside diameter and 1.778 mm thickness for Seal 1; 11.684 mm inside diameter and 1.778 mm thickness for Seal 2

Detailed Product Overview

Standard Ignition SK66 is a replacement fuel injector seal kit for service work on select Chevrolet Silverado 2500 HD, Silverado 3500, GMC Sierra 2500 HD, and Sierra 3500 models from 2001-2004. The kit uses black and copper sealing components and is built to meet or exceed OE specifications, making it a direct choice when injector sealing surfaces need attention. This part cross-references Standard Ignition SK184 for the same application.

Common Repair Uses

• Fuel seepage around the injector body
• Hard starting caused by injector seal leakage
• Rough idle related to air or fuel intrusion at the injector
• Fuel odor from worn injector O-rings
• Service replacement after injector removal

Installation Notes and Tips

Clean the injector bore and sealing surfaces before installation. Inspect the injector and surrounding components for wear, scoring, or contamination that could affect the seal. Verify the injector style and seal dimensions against the vehicle application before assembly.

Quality Assurance

Standard Ignition tests and inspects products in an ISO 9000-compliant environment and designs replacement parts to address common OE failure points. SK66 is engineered for service use where reliable injector sealing is required.