MasterShift Main Office is located in Fallbrook, CA. Near Temecula, in Northern San Diego County, Just mins away from the 15 FWY.

If you have any further support issues please contact American Supercars & Prototypes at 1-888-658-ASAP (2727)
or for outside the USA, call 1-760-723-2722.

Mailing Address: MasterShift
PO Box 1537
Fallbrook, CA 92088

For General Inquiries Contact: [email protected]

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