PERFORMANCE TECH is your very best One-Stop-Shop for skilled diagnostics, repairs, performance enhancements, custom transmission work, suspensions, interior, body and custom paint work using all of the latest technologies and provides one of the very best Diesel Specialist in the Los Angeles area. Our Chief Engineer and owner, John Maskrey is one of the most accomplished and knowledgeable diagnosticians and performance enhancement specialists in Los Angeles. John and his highly trained technicians offer efficient and effective diagnosis and repair at a cost which is only a fraction of the prices dealerships charge.