Deep's Garage in Santee engineers competition-ready race cars from its Argent Street shop, with a primary focus on Nissan and Toyota platforms for drifting and time-attack events. Each build integrates Mil-spec wiring harnesses, standalone ECU calibrations, and forged-internal engine assemblies sourced partly through the Prospect Avenue parts network that includes Autoworks Parts. Custom roll-cage fabrication follows SFI and FIA specifications for sanctioned competition use, and the shop's TIG and MIG welding capabilities extend to chromoly and aluminum chassis reinforcement. Trackside engineering support provides real-time data acquisition and ECU mapping adjustments during competition weekends at circuits including Willow Springs, Buttonwillow, and Auto Club Speedway. The fabrication pipeline for cage work, harness routing, and suspension geometry tuning overlaps with the two-wheeled custom builds at Darkside Customs on nearby Prospect Avenue. Highest-tier builds combine standalone engine management systems with custom exhaust-manifold fabrication, upgraded fuel systems, and forced-induction maps calibrated for Nissan and Toyota competition powertrains.