Raybestos 2637 PG Plus Professional Grade Brake Drum Castings meet SAE J431/G3000 specifications with 30,000 PSI tensile strength, ensuring consistent quality, strength, performance, and reduced noise Composite plates where specified by Original Equipment manufacturer ensures proper fit, function, and safety Certified to be consistent within Federal Safety Standards required for new vehicles, meaning each PG Plus brake drum is safe, reliable, and constructed with quality