Cox Performance Inc.: owned and managed by Darrell Cox residing in Bronson, Michigan. Darrell Cox Racing, a division of Cox Performance Inc., is a high performance product line which specializes in SRT performance. Darrell Cox Racing products were developed by passion and countless hours of research and development to push everything to its absolute limit. Darrell Cox, personally, stands behind all of his product from engine builds to DCR sponsored product produced by other manufacturers (unless product is abused, not properly tuned, not maintained and/or Darrell can find the cause of failure).