About Us

Quality Specialty Components (QSC) is located in Ontario CA. We have been one of the leading suppliers in the performance auto parts market for more than 10 years. We specialize in manufacturing clutch, flywheel, cylinder/pistons, headers, etc for Porsche, VW, and various Japanese cars. We are also experienced in custom making automotive components for different applications. With our advanced supply chain management system and state-of-the-art manufacturing facilities, we offer the road and track enthusiasts with high quality parts at affordable prices.