From Factory

Ferrea valve springs stand out as one of the best industry offerings

Each disc features a 4-paddle design and is constructed using a proprietary ceramic-metallic compound

ensuring reliable performance even in high-pressure environments

BMW S54 Piston Set by Arias SCR12559 From FactoryArias Forged Pistons for BMW S54 87. 25mm Bore, 11. 5: 1 Compression Mixing Power & Affordability Arias Pistons, backed by 55 years of high performance piston engineering experience, now offers a piston set for the BMW S54 platform. Manufactured from Arias forgings in the CP Carrillo facility in California, USA, these 87. 25mm bore, 11. 5: 1 compression forged pistons offer race proven durability and precision machining at a competitive price. Arias