Fast Burn Aluminum Cylinder Head

P/N 19417592

- CNC-machined aluminum performance cylinder head - Completely assembled with 2.000"/1.550" valves - 210cc intake port, roof raised .240" - 78cc D-shaped exhaust ports, raised .200" - requires Fel-Pro exhaust gasket P/N 1470 (may require minor trimming) - 62cc combustion chamber, .400" deck (can be milled up to .060") - No heat riser - Angled spark plugs (5/8" hex, 3/4" reach, tapered plugs) - 1.48" valve spring seat diameter - Use head gaskets with stainless steel fire rings - Raised, machined rocker rails - .530" maximum valve lift (without modifications) - Screw-in studs (3/8" top, 7/16" bottom) - New "time-serts" prevents oil migration through rocker studs - Dual bolt patterns for perimeter-bolt and center-bolt valve covers - Dual bolt patterns for Vortec and early-model intake manifolds - Machined bare head P/N 19300956 - Use intake gasket P/N 19301685

This head is assembled with the following components:

• 12555331 Intake Valves (4)
• 12551313 Exhaust Valves (4)
• 12625033 Valve Springs (8)
• 19301707 Valve Spring Seats (8)
• 19301708 Valve Spring Retainers (8)
• 10212810 Valve Stem Seals (8)
• 19301709 Valve Stem Key (16)
• 12552126 Valve Rocker Arm Studs (8)
• 10168519 Valve Guides (8)
• 12346004 Valve Rocker Arm Stud Sealer

Notes: The heads can be used on any 4.00-inch bore Small-Block with the standard-flow coolant system.

 

NOT for use on Gen II 1992-1996 LT1/LT4 engines with reverse-flow cooling system.

Previously was GM P/N 12464298, 19300955

Sold individually.