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By leading through innovation, MasterShift™ is able to deliver creative ideas and solutions to the automotive aftermarket paddle shift industry, and to its customers & dealers. MasterShift™ operates with the highest standards, individually and as a company, giving you honesty, responsibility, and integrity. We would never put the MasterShift™ brand name on any product that is not up to our standards.

About Us

American Supercars and Prototypes - MasterShift™, was formed in 2002 to commercialize its research and development work.

The MasterShift™ brand name was created for the companies line of electronic paddle shifters and transmission enhancement technologies. Founded in Fallbrook, CA American Supercars and Prototypes, LLC is proudly manufactured in the United States.

ASaP™ and MasterShift™ has a dedicated team ready to assist you or your company in your aftermarket paddle shifting needs.

Mastershift™ working with Pratt Miller has won the title for Best New Engineered Product at SEMA (Specialty Equipment Market Association) for 2013 and won SEMA's Best New Custom Car Product for 2010.


Management Team


Louie Zember:

Chris Trevino:
(Research & Dev / Tech)

Kendra Pringle:
(Office Manager)

Jose Camacho:
(Tech Support)

Robert Schruhl:

Louie Zember, an entrepreneur with over 35 years of experience in developing and founding successful companies, has teamed up with Robert Schruhl, to form the Management Team of American Supercars and Prototypes, LLC. Since 2002 Chris has been a technical consultant, and design engineer for aftermarket electronic shift control systems. He oversees the research & development and technical support departments at MasterShift™.