Description:

XFI NSR (No Springs Required) Blower Hydraulic Roller Swinging/Finger Follower Camshafts DOHC - Max effort street/strip Cam set. Best choice when running higher boost levels and high RPM in modified engines. Requires ECU programming. Requires Cam phaser limiter kit Part #5493 or optional Cam phaser lock kit #5492 for Race Applications.