FAST 146025-KIT LSXR OE Fuel Injector Spacer Kit for GM LS3/LS7/L76/L99 1.070

Vehicle Fitment

• GM Gen IV LS-Series Engines (LS3, LS7, L76, L99) with FAST LSXR 102mm Intake Manifold (Part #146102, 146102B, 146103B, 146104B)

Fitment Notes

• Designed to allow use of OE factory LS3/LS7/L76/L99 fuel rails with the FAST LSXR 102mm intake manifold only
• Extends shorter OEM-style fuel injectors to match the length of longer-style injectors required by the FAST LSXR manifold
• Not compatible with LS1, LS2, or LS6 injector styles
• For race and off-road use only; not legal for sale or use on emissions-controlled vehicles

Features

• Aluminum construction provides a durable, lightweight adapter solution for LS3/LS7 injector fitment
• 1.070 in. (27.2 mm) spacer thickness precisely matches the length difference between short and long injector styles
• Allows retention of factory OE fuel rails, avoiding the need for aftermarket rail upgrades
• Included O-rings are component-matched for a secure, leak-free seal at each injector port
• Made in the USA for consistent quality and dimensional accuracy

Specifications

• Material: Aluminum
• Spacer Thickness: 1.070 in. (27.2 mm)
• Compatible Engines: GM LS3, LS7, L76, L99 (Gen IV)
• Compatible Manifold: FAST LSXR 102mm Intake Manifold (#146102, 146102B, 146103B, 146104B)
• O-Rings Included: Yes
• Quantity: Sold as a set of 8 spacers

Included Components

• 8x Aluminum fuel injector spacers (1.070 in.)
• 8x O-rings for use with spacers

Product Description

The FAST 146025-KIT is a fuel injector spacer kit designed to bridge the fitment gap between OE LS3/LS7/L76/L99 fuel rails and the FAST LSXR 102mm intake manifold. Because the LSXR manifold requires longer-style injectors, this kit extends the shorter OEM injectors to the correct seating depth, allowing builders to retain their factory fuel rails without additional modifications.

Each kit includes eight precision-machined aluminum spacers and eight matched O-rings for a clean, leak-free installation. It's an ideal solution for LS swap builders and performance enthusiasts looking to run the FAST LSXR intake while keeping OEM Gen IV fuel system components.