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12-point head design and a larger-than-stock shank diameter
Flows 1150 cfm
The air flowing under the plenum provides a cooler charge for the incoming air with less heat transfer from the engine
swap out installation utilizing existing metering blocks
Speedmaster aluminum pulleys are made from a 356 aluminum alloy that is heat-treated to T-6 specs
GM A-Body 9" Rear Housing Suspension Bracket Kit - Late 1967-'72 12-point head design and aSpeedmaster bracket kit works for late '67 '72 GM A body cars such as Chevelle, Monte Carlo, Cutlass, Skylark, GTO Lemans with domed style spring pads. Kit includes upper control arm brackets with greasable rod ends installed, coil spring perches for the tops of the tubes, lower control arm mounts, urethane bump stops, and separate shock mounts that are not incorporated into the control arm mount so that they may be in boarded for tire clearance.
