COMP Cams 08-500-8 - CamShaft, CS XR258HR-12

Hydraulic Roller - Xtreme Energy Computer Controlled: For throttle body 305 or 350, very good economy and power.

Hydraulic Roller - Xtreme Energy Computer Controlled: For throttle body 305 or 350, very good economy and power.; 258/264 Advertised Duration, 206/212 Duration .050", .480"/.488" Lift, 112 Lobe Separation; 1000 to 5000 RPM range; Must use bronze tip fuel pump pushrod when using high pressure or high volume pump;