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Ferrea valve springs are heat-treated and stress-relieved to maintain strength and stability even under extreme conditions
Torque all 11 mm studs as follows:
material is carefully removed from the walls of the intake and exhaust ports to simultaneously enlarge them and improve their shape for optimal flow
and mechanical simplicity are critical
They have also been successfully tested in high-horsepower turbocharged applications
BMW S68 Valve Spring Kit by Ferrea Kelford Cams Ferrea valve springs are heat-treatedThe Ferrea Valve Spring Kit for BMW S68 engines is engineered for superior durability and performance under extreme conditions. Factory valve springs can struggle to meet the demands of high boost, aggressive cam profiles, and sustained high RPM, leading to valve float and potential engine failure. Ferrea valve springs are designed to prevent these issues by offering increased seat pressure and improved coil bind clearance, ensuring precise valve
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