Conversion Shops
In the past I did not think much of 3rd party CNG conversions (non-factory), but have since changed by view after conversing with other CNG owners and converters. I would recommend weighing cost, warranty, knowledge of installer/maintainer, availability of parts, etc. with a factory vs. 3rd party conversion. Whatever you do, make sure all shops are trained/certified to install and maintain a CNG system and that kits are EPA/CARB certified. (Some states will not pass emissions for non-certified kits and others will not honor tax credits - but the big one is the EPA that can fine you $5,000 per day for using a non-certified kit.) A CNG system inappropriately installed could be dangerous (... as could a gasoline system).
- (AL, Birmingham) Phoenix Energy
- (AZ, Mesa) Alternative Fuel Systems
- (AZ, Peoria) Tech 1 Auto
- (AZ, Phoenix) AFVTech/Natural Drive
- (CA, Fontana) AFV Fleet Service
- (CA, Fresno) A1 Auto Electric
- (CA, Gardena) Holden Fleet Services (fleet vehicles only)
- (CA, Huntington Beach) Alternative Fuel Technology (714.842.3017)
- (CA, Huntington Beach) EnviroMech Industries
- (CA, Los Altos) Baytech Corp
- (CA, Mira Loma) Diversified Truck Center
- (CA, Riverside) Complete Coachworks
- (CO, Commerce City) FuelTek Conversion Corp (Wes Biggers)
- (IL, Schiller Park) Atlas Mid America Energy
- (IL, Wauconda) Hendrix Industrial Gastrux (847.526.1700)
- (MO, St. Louis) Alternative Fuels of St. Louis (314.892.5660)
- (NC, Arden) Transecoenergy Energy Corporation
- (NV, Reno) City Engine
- (OK, Tulsa) Tulsa Gas Technology
- (TX, Austin) CleanFuel Conversions
- (TX, Dallas) BAF Technologies
- (TX, McKinney) Emission Solution Inc
- (UT, Centerville) Lancer Automotive Group
- (UT, Holladay & Salt Lake City) CNG Technologies of Utah
- (UT, Layton) CNG Conversions, Inc
- (UT, Ogden) Ashton Motors
- (UT, Salt Lake City) Larry Miller Ford
- (UT, Salt Lake City) Semi-Service
- (UT, Salt Lake City) Sno-Motion Solutions
- (UT, St. George) Modern Fuel Conversions, Inc (435.680.5355)
- (VA, Richmond) Baker Equipment

Comments
CNG
I agree although in order to completely convert to the alternative fuels, as a Mesa Auto Mechanic in Arizona, I believe that the engineers need to come up with more innovative and durable ways of supplying the fuels to the vehicle to prevent corrosion and other component wear, which is the demise of using these fuels.