An Arce Enterprises affiliate founded in 1990, San Diego Engine Parts in Santee stocks standard and performance engine components from its Prospect Avenue machining complex. The 10704 Prospect Avenue facility houses San Diego Crankshafts and San Diego Engine Balancing under the same roof, forming a vertically integrated build operation that parallels the drivetrain work at Performance Transmissions on Ablette Road. Inventory includes MAHLE pistons, Clevite bearings, and COMP Cams camshafts sourced for both stock-replacement and high-performance engine assemblies shipped across the United States. Completed short-block and long-block builds are validated on chassis dynamometers at The Dyno Shop, housed in the same Prospect Avenue industrial park at 10042 Prospect. The in-house crankshaft grinding and journal polishing equipment pairs with magnaflux crack detection to verify casting integrity and bearing surface finish before final long-block assembly.