About Us

5523 Motorsports is a premier engine builder, wiring specialist, fabricator, automotive restoration/Restomod shop, machine shop, and diagnostic specialist, located in North County San Diego, CA. 

We specializes in building performance engines, for a variety of applications. We can put together an engine package to fit your driving needs, and budget. Our engine packages have been tested, and are built on a foundation of quality parts, and attention to detail. Everything from a simple rebuild, of your daily driver, to complete engine design for racing applications can be yours. We also specialize in prototyping, and practical testing of internal engine components including pistons, camshafts and crankshafts.

5523 Motorsports custom wiring harnesses can be as simple or complex as you need. We can design a harness comparable to the factory harness, something that can survive even the harshest of environments or anything in between. We also specialize in modification of factory harness to integrate aftermarket control systems, gauges, sensors, or anything else you need to keep your car running smoothly.

Our staff will help you with everything from race car preparation, fabrication, tuning, maintenance of modified and race/track cars, aftermarket electronics installation, suspension set-up and installation, turbo system design and off-road engine development for imports to maintenance of your daily driver.

Our wonderful mechanics and fabricators have over 15 years of experience working with sport compacts. Our lead mechanic/fabricator is a Nissan Master Technician, an ASE Master Technician, and DFRT OBD II Certified. His Nissan Master Technician training includes, but is not limited, to GTR certification, new model CVT gearboxes, the newest release production engines (VQ37VHR, VQ35HR, all MR and HR family engines and the QR25DE), Altima Hybrid Certification, LEAF electric vehicle certifications, and Nick is a Z/G/Murano convertible top specialist.

His strengths include intensive electrical troubleshooting, complex wiring harness fabrication, CAN diagnosis, internal engine component design, prototyping and practical testing, specialty tool design and fabrication, race car engine design and building and race car design and setup. He also specializes in steel and aluminum fabrication which includes cutting, welding, (TIG & MIG) and shaping for exhausts, intercooler piping, and turbo plumbing.

5523 Motorsports, LLC.

1960 W. Mission Rd. 
Suite 5
Escondido, CA 92029

Email : info@5523motorsports.com