We Engineer & Produce
Fuel Systems & Critical Components
For CNG-Powered Medium and Heavy-Duty Vehicles
Recent News
NEW! 165 DGE Back-of-Cab CNG Fuel System
Mainstay Fuel Technologies, Inc. announces it has begun production of a new 165 DGE Back-of-Cab on-board CNG ... » Read Article.
Spire Natural Gas Fueling Solutions and Mainstay Fuel Technologies team up to offer more complete options for fleets considering CNG
Fleet operators looking to transition to compressed natural gas (CNG) got a big boost today. Together at the Advanced Clean Transportation (ACT) Expo, ... » Read Article.
Mainstay Delivers New CNG Fuel Systems to Car Hauler
Mainstay Fuel Technologies, Inc. and Virginia Transportation Corporation announce the completion and delivery of thirty custom designed fuel systems for use in Virginia Transportation’s ... » Read Article.
Mainstay Fuel Technologies, Inc. announces the completion of its expansion into a new facility
ANDERSON COUNTY, SC -- Mainstay Fuel Technologies, Inc. today announced that it has completed the consolidation of its operations into a 60,000 square ... » Read Article.
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About Mainstay
Mainstay is a fuel system and component manufacturer located in Piedmont, SC, halfway between Charlotte and Atlanta. With a dedicated commitment to quality, integrity and adherence to best practices, we guarantee our work and your satisfaction.