12339 Designed for use with gas and alcohol fuels

Requires "A" & "B" Looms for installation

Ferrea Valve Springs are the ideal choice for racing scenarios where high RPMs and elevated stress are expected

including the 1 Series

BMW N54 Valves by Ferrea Options:Triple Groove - 32mm Intake / 28.5mm Exhaust 12339 Designed for use withFerrea Competition Plus Valves are known for being one of the most dependable extreme duty valves available, engineered specifically for BMW N54 engine. Crafted from aerospace grade alloys like EV8 Z18, these high performance valves deliver superior tensile strength and reliability, perfect for pushing your engine to the limit. Ferreas exclusive two step slow forging process optimizes grain flow, reducing stress in the material for unmatched