Description: Pro Action Aluminum Racing 24 deg. Bare Cylinder Head - Big Block Chevy - 320cc Runner - 119cc Chamber - Angle Spark Plug - 2.25in.x11/32in.+0.250in. Valve Size - Racing Head Service (RHS) Part Number 11011
Description: Pro Action Aluminum Racing Assembled Cylinder Head - Big Block Chevy - Hyd. Roller - 320cc Runner - 119cc Chamber - Angle Spark Plug - 2.25in.x11/32in.+0.250in. Valve Size - Racing Head Service (RHS) Part Number 11011-02
Description: Pro Action Aluminum Racing Assembled Cylinder Head - Big Block Chevy - Solid Roller - 320cc Runner - 119cc Chamber - Angle Spark Plug - 2.25in.x11/32in.+0.250in. Valve Size - Racing Head Service (RHS) Part Number 11011-03
Description: Pro Action Aluminum Racing Assembled Cylinder Head - Big Block Chevy - Hyd. Roller - 320cc Runner - 119cc Chamber - Angle Spark Plug - 2.25in.x11/32in.+0.250in. Valve - w/Beehive Springs - Racing Head Service (RHS) Part Number 11011-05
Description: Pro Action Aluminum Racing 24 deg. Bare Cylinder Head - Big Block Chevy - 360cc Runner - 119cc Chamber - Angle Spark Plug - 2.3 in.x11/32 in.+0.250in. Valve Size - Racing Head Service (RHS) Part Number 11012
Description: Pro Action Aluminum Racing Assembled Cylinder Head - Big Block Chevy - Hyd. Roller - 360cc Runner - 119cc Chamber - Angle Spark Plug - 2.3in.x11/32in.+0.250in. Valve Size - Racing Head Service (RHS) Part Number 11012-02
Description: Pro Action Aluminum Racing Assembled Cylinder Head - Big Block Chevy - Mech. Roller - 360cc Runner - 119cc Chamber - Angle Spark Plug - 2.3in.x11/32in.+0.250in. Valve Size - Racing Head Service (RHS) Part Number 11012-03
Description: Pro Elite Bare Cylinder Head - Big Block Chevy - 24 deg. - For Solid Roller - 339cc Runner - 121cc Chamber - Straight Spark Plug - 2.25in./1.88in.+0.250in. Valve Size - Aluminum - Racing Head Service (RHS) Part Number 11034
Description: Pro Elite Bare Cylinder Head - Big Block Chevy - 24 deg. - For Solid Roller - 376cc Runner - 121cc Chamber - Straight Spark Plug - 2.3in./1.88in.+0.250in. Valve Size - Aluminum - Racing Head Service (RHS) Part Number 11038
Description: Cylinder Head Assembly Kit - 320cc Runner - Solid Roller - 1.63 in. - 2.25 in. Valve Intake/1.88 in. Valve Exhaust - Incl. Parts To Assemble 1 Cylinder Head - w/Beehive Springs - Racing Head Service (RHS) Part Number 11120-01B
Description: Pro Action 24 deg. Bare Cylinder Head - Big Block Chevy - 119cc Chamber - 320cc Runner - 2.25in.+.250in./1.880in.+.100in. Valve Size/Length - Cast Iron As-Cast - Racing Head Service (RHS) Part Number 11301
Description: Pro Action Assembled Cylinder Head - Big Block Chevy - For Hyd. Roller - 320cc Runner - 119cc Chamber - Angle Spark Plug - 2.25in.x11/32in.+0.250in. Valve Size - Cast Iron - Racing Head Service (RHS) Part Number 11301-02
Description: Pro Action Assembled Cylinder Head - Big Block Chevy - For Mech. Roller - 320cc Runner - 119cc Chamber - Angle Spark Plug - 2.25in.x11/32in.+0.250in. Valve Size - Cast Iron - Racing Head Service (RHS) Part Number 11301-03
Description: Pro Action 24 deg. Bare Cylinder Head - Big Block Chevy - 119cc Chamber - 360cc Runner - 2.3in.+.250in./1.880in.+.100in. Valve Size/Length - Cast Iron As-Cast - Racing Head Service (RHS) Part Number 11302
Description: Pro Action Assembled Cylinder Head - Big Block Chevy - For Hyd. Roller - 360cc Runner - 119cc Chamber - Angle Spark Plug - 2.30in.x11/32in.+0.250in. Valve Size - Cast Iron - Racing Head Service (RHS) Part Number 11302-02
Description: Pro Action Assembled Cylinder Head - Big Block Chevy - For Mech. Roller - 360cc Runner - 119cc Chamber - Angle Spark Plug - 2.30in.x11/32in.+0.250in. Valve Size - Cast Iron - Racing Head Service (RHS) Part Number 11302-03
Description: Cylinder Head Assembly Kit - 320cc Runner - Hyd. Roller - 1.5 in. - 2.25 in. Valve Intake/1.88 in. Valve Exhaust - Incl. Parts To Assemble 1 Cylinder Head - Racing Head Service (RHS) Part Number 11924-01
Description: Cylinder Head Assembly Kit - 320cc Runner - Hyd. Roller - 1.5 in. - 2.3 in. Valve Intake/1.88 in. Valve Exhaust - Incl. Parts To Assemble 1 Cylinder Head - Racing Head Service (RHS) Part Number 11924-02
Description: Cylinder Head Assembly Kit - 320cc Runner - Solid Roller - 1.63 in. - 2.25 in. Valve Intake/1.88 in. Valve Exhaust - Incl. Parts To Assemble 1 Cylinder Head - Racing Head Service (RHS) Part Number 11991-01
Description: Cylinder Head Assembly Kit - 320cc Runner - Solid Roller - 1.63 in. - 2.3 in. Valve Intake/1.88 in. Valve Exhaust - Incl. Parts To Assemble 1 Cylinder Head - Racing Head Service (RHS) Part Number 11991-02
Description: Pro Action 23 deg. Bare Cylinder Head - Small Block Chevy - 64cc Chamber - 220cc Runner - Angle Spark Plug - 2.02in./1.6in.+ 0.100in. Valve Size/Length - Aluminum As-Cast - Racing Head Service (RHS) Part Number 12029
Description: Pro Action Assembled Cylinder Head - Small Block Chevy - For Flat Tappet - 220cc Runner - 64cc Chamber - Angle Spark Plug - 2.02in.x11/32in.+0.100in. Valve Size - Aluminum - Racing Head Service (RHS) Part Number 12029-01
Description: Pro Action Assembled Cylinder Head - Small Block Chevy - For Hyd. Roller - 220cc Runner - 64cc Chamber - Angle Spark Plug - 2.02in.x11/32in.+0.100in. Valve Size - Aluminum - Racing Head Service (RHS) Part Number 12029-02
Description: Pro Action Aluminum Racing 23 deg. Bare Cylinder Head - Small Block Chevy - 180cc Runner - 72cc Chamber - Straight Spark Plug - 2.120 in.x1.812i n.+0.100 in. Valve Size - Racing Head Service (RHS) Part Number 12041
Description: Pro Action Aluminum Racing Assembled Cylinder Head - Small Block Chevy - Flat Tappet - 180cc Runner - 72cc Chamber - Straight Spark Plug - 2.120in.x1.812in.+0.250in. Valve Size/Length - Racing Head Service (RHS) Part Number 12041-01
Description: Pro Action Aluminum Racing Assembled Cylinder Head - Small Block Chevy - Hyd. Roller - 180cc Runner - 72cc Chamber - Straight Spark Plug - 2.1202in.x1.812in.+0.100in. Valve Size/Length - Racing Head Service (RHS) Part Number 12041-02
Description: Pro Action Aluminum Racing 23 deg. Bare Cylinder Head - Small Block Chevy - 180cc Runner - 72cc Chamber - Angle Spark Plug - 2.120 in.x1.812in. - +0.100 in. Valve Size/Length - Racing Head Service (RHS) Part Number 12042
Description: Pro Action Aluminum Racing Assembled Cylinder Head - Small Block Chevy - Flat Tappet - 180cc Runner - 72cc Chamber - Angle Spark Plug - 2.120 in.x1.812in. - +0.100 in. Valve Size/Length - Racing Head Service (RHS) Part Number 12042-01
Description: Pro Action Aluminum Racing Assembled Cylinder Head - Small Block Chevy - Hyd. Roller - 180cc Runner - 72cc Chamber - Angle Spark Plug - 2.120 in.x1.812in. - +0.100 in. Valve Size/Length - Racing Head Service (RHS) Part Number 12042-02
Description: Pro Action Aluminum Racing 23 deg. Bare Cylinder Head - Small Block Chevy - 200cc Runner - 72cc Chamber - Straight Spark Plug - 2.020 in.x11/32 in.+0.100 in. Valve Size/Length - Racing Head Service (RHS) Part Number 12043
