SPC Performance (Specialty Products Company) is a leading manufacturer of automotive alignment parts, suspension components, and tools for domestic and import vehicles.
SPC Performance, also operating as Specialty Products Company, has been a pioneer in the automotive alignment industry since 1972. Based in Longmont, Colorado, the company designs, tests, and manufactures world-class suspension solutions for a wide range of vehicles, from daily drivers to fleet trucks and high-performance racing machines.
Their comprehensive product catalog includes adjustable upper control arms, camber kits, coil springs, and specialized alignment tools essential for correcting suspension geometry after lifts or lowering. An ISO/IATF 16949 compliant manufacturer, SPC Performance is dedicated to providing professional installers and DIY enthusiasts with high-quality parts that ensure safety, proper tire wear, and optimal handling.
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SPC requires using a grease that meets NLGI #2, Grade LB standards with 3-5% Molybdenum Disulfide. Pivots should be checked and greased often.
Loosen the jam nuts on either side of the adjusting sleeves (note that nuts closest to the cross shaft are often left-handed threads). Rotate the adjustment sleeves to lengthen or shorten the arm to the desired alignment, then retighten the jam nuts and torque pivot bolts as specified in the instructions.
SPC Performance parts are manufactured by Specialty Products Company (Niwot Corp.), headquartered in Longmont, Colorado.
Yes, many SPC control arms are side-specific. Orientation is often determined by the position of the ball joint plate (e.g., welded stud towards the front or rear). Always refer to the specific instruction sheet for your part number.