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Cam Grind Type:MECHANICAL ROLLER CAMS
Application: PONTIAC 55-81 265-287-301(4.9L)-316-326-347-350-389-400(6.6L)-421-428-455
Block Size: SB
Engine Make: PONTIAC
# Of Cylinders: 8
Manufactured In Year: 55 - 81
Cubic Inch Size / Volume: 265-287-301-316-326-347-350-389-400-421-428-455 | 4.9L , 6.6L
Additional Qualifier: 301=(4.9L) and 400=(6.6L) ONLY
Brand Code: Herbert Performance Cams
Dur Int-Exh: 305/310
Dur @ .050 Int-Exh: 270/275
Lift 1.5 - 1.5 Int/Exh: 615/620
Lift 1.6 -1.6 Int/Exh:
Lift 1.7 -1.7 Int/Exh:
Lobe Center: 106
Valve Lash: .025-.025
RPM Range: 4000-7500
Description: Competition only, good mid range, 12.0:1 minimum compression, bracket race.