They seem to be a full service and Dyno shop, from detailing to tuning.
The website will show you the cars in their collection... and other stuff of course.
10343 Roselle St (East of the 805 on Mira Mesa Blvd)
for a map: http://www.cardealerssearch.com/only-yesterday-classic-autos-inc/303/
San Diego's Sorrento Valley
858 677 2886