While both the 11mm L19 and 10mm Custom Age 625+ head studs are high-quality options made to ARP standards

With optimized spring rates

are exclusively designed for BMW N55 and S55 engines

(12) Intake valves

15mm Valve Lift

CP Forged Piston Set, BMW S14 2.7L Compression Ratio:11.5:1 While both the 11mm L19CP Carrillo represents the highest quality pistons on the market, engineered for maximum power and durability. Utilizing high strength, lightweight materials and advanced engineering, this BMW S14 2. 7L piston set features: Lightweight Design: CP Carrillo pistons are made from high strength, lightweight materials, such as forged aluminum alloy. Reduced piston weight contributes to improved engine responsiveness and acceleration. Advanced Engineering: