Key Specs

Cylinder Head StyleAssembled
Material TypeAluminum
Combustion Chamber Volume54cc
Intake Runner Volume195cc

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Designed for 1996 LT4 (or) 1992-97 LT1 small-block Chevy engines, LT4 cylinder heads are CNC ported for improved airflow and peak performance. Features include high-quality 8mm stem stainless steel intake and exhaust valves that feed the high flow intake and exhaust ports. The high-velocity intake entries and exhaust exits are CNC profiled for increased air-flow Combustion chambers are fully CNC machined for absolute consistency and combustion. High-quality conical beehive springs are secured with titanium retainers and valve locks for performance up to .600in. valve lift. LT4 heads are equipped with guide plates and 8mm stem valves, adjustable rocker arms are required.
  • Conical Progressive Rate Springs
  • Accurate Seat Pressure Up To 0.6 in. Lift
  • 8mm Valve Stem Dia. Reduces Valvetrain Weight
  • Larger Valves For Improved Flow
  • Fully CNCd Combustion Chambers
  • Chevy LT4 Engines

Installation Instructions (PDF)


Cylinder Head StyleAssembled
Material TypeAluminum
Combustion Chamber Volume54cc
Intake Runner Volume195cc
Exhaust Runner Volume75cc
Combustion Chamber Volume Range50cc - 59cc
Intake Runner Volume Range190cc - 199cc
Exhaust Runner Volume Range70cc - 79cc
CNC-Machined RunnersNo
CNC-Machined Combustion ChamberYes
Spark Plug StyleAngle
Intake Port ShapeRectangle
Intake Port LocationStandard
Exhaust Port ShapeD-port
Exhaust Port LocationStandard
Intake Valve Diameter2.020"
Intake Valves IncludedYes
Intake Valve Angle23
Exhaust Valve Diameter1.570"
Exhaust Valves IncludedYes
Valve Spring IncludedYes
Spring Diameter1.290"
Damper Spring IncludedNo
Number of Springs Per ValveSingle
Maximum Lift0.600"
Machined for O-RingNo
Valve Seat Machine Style3-angle
Valve Seats MachinedYes
Valve Seat MaterialDuctile Iron
Valve Stem Seals IncludedYes
Valve Stem Seal TypePositive Stop
Valve Guides IncludedYes
Valve Guide MaterialManganese Bronze
Locks IncludedYes
Lock Style7 Degree
Retainers IncludedYes
Retainer MaterialTitanium
Guideplates IncludedYes
Guideplate Pushrod Size0.3125"
Rocker Arms IncludedNo
Rocker Arm Studs IncludedYes
Rocker Arm Nuts IncludedNo
Oiling StyleThrough Pushrod
Heat CrossoverNo
Steam Holes DrilledNo
Accessory Bolt Holes DrilledYes
Valve Cover Mounting StyleCenterbolt
NotesUses 14mm spark plugs with 3/4" reach, and flat gasket seals
Sold in QuantityEach
GTIN Code085347619399