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Fast Burn Aluminum Cylinder Head Assembly

Brand: Chevrolet Performance

Part Number: 19300955




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Fast Burn Aluminum Cylinder Head Assembly

19300955 Chevrolet Cylinder Head


Chevrolet Performance’s Fast Burn 23-degree cylinder heads deliver maximum performance for Small-Block engines. An aluminum head casting – distinguished by Chevy Bowtie logos at each end – and a valvetrain with high-rpm, LS-style beehive-type valve springs stretches the performance range of the heads to enable greater power at a higher rpm! Fast Burn technology delivers more horsepower by increasing cylinder pressures, which maximizes the air/fuel mixture’s combustion. The 62cc combustion chamber is designed for use with flat-top pistons. The CNC-machined Fast Burn heads require no additional porting for optimal performance, so all you need to do is bolt them onto your Small-Block and go!

Fast Burn Aluminum Cylinder Head

P/N 19300955

• 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


Sold individually.