SMG Universal LS/LT Flex Harness
SMG Flex Fuel Sensor Wiring Harness – LS/LT Applications
SMG’s Flex Fuel Harnesses make adding a flex fuel sensor to your LS or LT build simple, clean, and reliable. Designed for straightforward installation and dependable operation, this harness is built with the same high-quality materials we use in our in-house performance builds.
Engineered for LS & LT Platforms
Compatible with most LS- and LT-based engines, this harness is the ideal solution for adding flex fuel capability to both street and race applications.
Smart Power & Simple Install
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Proven ignition coil jumper power source – avoids cutting into factory wiring while delivering stable voltage.
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PCM disconnect lead allows quick, clean connection to the ECM without back-probing or splicing.
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Fully sleeved in abrasion-resistant braided loom to protect against heat, vibration, and engine bay wear.
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Designed for OEM-like fit and finish with professional-grade terminals and seals.
Why SMG?
We design our harnesses from hands-on experience building high-performance LS and LT combinations. Each harness is tested for proper fit, signal integrity, and durability — so you can focus on tuning and driving, not troubleshooting wiring.
Processing & Shipping Overview
Processing occurs before shipping.
Most in-stock items typically process within 2–3 business days before shipment or pickup. Expedited shipping options affect transit time after an order ships and do not speed up processing.
Made-to-order, special-order, vendor drop-ship, and freight items require additional processing time before shipping. Any extended lead times will be noted on the product page when applicable.
For the most up-to-date order status or lead time questions, please contact sales@smgspeed.com or use live chat during business hours.