Standard Ignition SK133 Fuel Injector Seal Kit

Fuel Injector Seal Kit for Rail Pack Service

Standard Ignition SK133 is a fuel injector seal kit for MFI rail pack applications that use rubber O-rings and injector seals. It is built for direct service on a wide range of vehicles, including Nissan Frontier, Jeep Liberty, and Dodge Ram 1500 applications.

Use SK133 when servicing injector seals on compatible rail pack fuel systems across model years from 2003 through 2013. The kit is intended for multi-port fuel injection service where the injector seal profile and dimensions must match the original rail pack setup.

Key Features

• Brand: Standard Ignition
• Part number: SK133
• Fuel injector seal kit for MFI rail pack service
• Rubber construction with black and green seals
• Assorted sizes for rail pack injector sealing applications
• Fits injector service on 6-cylinder rail pack layouts
• Includes 12 O-rings
• No hardware, pintle cap, or upper intake manifold gaskets included

Detailed Description

Standard Ignition SK133 is a replacement fuel injector seal kit engineered for rail pack fuel injector service. The kit uses rubber O-rings with the listed inside and outside dimensions to restore sealing at the injector-to-rail interface on compatible MFI systems. This makes SK133 a practical choice for maintenance on vehicles such as Nissan Frontier, Jeep Liberty, and Dodge Ram 1500, along with many other listed applications.

This part cross-references 2-12389 and 800-93021 for the same application. When replacing injector seals, matching the seal type and dimensions is critical for proper fuel system service, and SK133 is specified as an MFI seal kit for rail pack use.

What It Helps Fix

• Fuel odor caused by worn injector seals
• Fuel seepage at the injector rail connection
• Hard starting related to injector seal leakage
• Vacuum leaks at the injector sealing point
• Rough idle from compromised fuel injector O-rings

Installation Notes and Tips

Confirm the vehicle uses a rail pack MFI injector seal setup before ordering. Compare the original seal dimensions and seal style to the SK133 specifications, and inspect injector bores and rail surfaces for damage before installation. Clean all sealing surfaces thoroughly and replace any hardened or flattened O-rings during service.

Compatible fitment includes 2005-2013 Nissan Frontier, 2004-2012 Jeep Liberty, 2004-2010 Dodge Ram 1500, 2005-2010 Ford Mustang, and 2005-2010 Jeep Grand Cherokee. Additional applications include 2011-2013 Lincoln MKZ and 2008-2010 Chrysler Town & Country.

Quality Assurance

Standard Ignition supplies service parts for fuel system repair and maintenance. SK133 is built to the listed seal specifications for rail pack injector service and is identified by the Standard Ignition part number SK133 for accurate ordering and replacement.