Racing Flag

PARTS INTENDED FOR COMPETITION USE ONLY.
Click for more details.

Racing Flag

PARTS INTENDED FOR COMPETITION USE ONLY.
Click for more details.

LSX CYLINDER HEADS

19201807

LSX-L92 SMALL-BORE CYLINDER HEAD

  • LS3/L92 Port Configuration
  • “As-cast” runners and combustion chamber
  • 15° valve angle
  • Assembled with 2.00" intake and 1.55" exhaust valves
  • 250-cc intake port and 80-cc exhaust port
  • 70-cc combustion chamber
  • Intake flow – 280 cfm @ .600" lift /
    Exhaust flow – 180 cfm @ .700" lift
  • Beehive valve springs
  • Uses LS3-/L92-style rocker arms (offset)
  • 3.890" minimum bore size
  • Uses LS3-/L92-style intake manifold

19354243

LSX-LS3 CYLINDER HEAD

  • L92-style rectangle port design
  • Assembled with 2.165" hollow-stem intake and 1.590" solid-stem exhaust valves
  • 15° valve angle; minimum 4.000" bore
  • 260-cc “as-cast” intake ports, 80-cc “as-cast” exhaust ports
  • 70-cc “as-cast” combustion chambers
  • Uses LS3 rocker arms/LS7 bolts

19354242

LSX-LS7 CNC-PORTED BARE CYLINDER HEAD

  • Fully CNC-ported
  • 6-bolt-per-cylinder bolt pattern
  • LS7-style rectangle port design
  • 12° valve angle; minimum 4.100" bore
  • 70-cc “as-cast” combustion chambers
  • Uses LS7 rocker arms/LS7 bolts
  • 397 cfm@0.700" intake, 230 cfm @ 0.700" exhaust

19354241

LSX-LS7 CNC-PORTED CYLINDER HEAD ASSEMBLY

  • Fully CNC-ported
  • 6-bolt-per-cylinder bolt pattern
  • LS7-style rectangle port design
  • Assembled with 2.200" titanium intake and 1.610" sodium-filled exhaust valves
  • 12° valve angle; minimum 4.100" bore
  • 70-cc “as-cast” combustion chambers
  • Handles .650" lift with premium springs
  • Uses LS7 rocker arms/LS7 bolts
  • Uses P/N 19257879 bare head (shown)
  • 397 cfm @ 0.700" intake, 230 cfm @ 0.700" exhaust

19354239

LSX-LS7 CYLINDER HEAD ASSEMBLY – AS CAST

  • 6-bolt-per-cylinder bolt pattern
  • LS7-style rectangle port design
  • Assembled with 2.200" titanium intake and 1.610" sodium-filled exhaust valves
  • 12° valve angle; minimum 4.100" bore
  • 270-cc “as-cast” intake ports, 85-cc “as-cast” exhaust ports
  • 70-cc “as-cast” combustion chambers
  • Handles .650" list with premium springs
  • Uses LS7 rocker arms/LS7 bolts

19354240

LSX-LS7 BARE CYLINDER HEAD – AS CAST

  • Used in P/N 19201806

19354244

LSX-LS9 CYLINDER HEAD ASSEMBLY

  • L92-style rectangle port design
  • Assembled with 2.165" titanium intake and 1.590" sodium-filled exhaust valves
  • 15° valve angle; minimum 4.000" bore
  • 260-cc “as-cast” intake ports, 80-cc “as-cast” exhaust ports
  • 70-cc “as-cast” combustion chambers
  • Uses LS3 rocker arms/LS7 bolts

19417408

LSX-SC BARE CYLINDER HEAD – AS-CAST

  • Made of A356 aluminum with low-pressure casting and Hot Isostatic Pressing for enhanced strength and material density
  • Un-ported casting with smaller water jackets to accommodate additional porting and machining.
  • Valve seats and valve guides included, but delivered uninstalled  

19417887

LSX-SC BARE CYLINDER HEAD – CNC-MACHINED

  • Made of A356 aluminum with low-pressure casting and Hot Isostatic Pressing for enhanced strength and material density
  • CNC-machined intake and exhaust ports
  • CNC-machined combustion chambers
  • Includes valve seats and valve guides installed

19417888

LSX-SC ASSEMBLED CYLINDER HEAD – CNC-MACHINED

  • Made of A356 aluminum with low-pressure casting and Hot Isostatic Pressing for enhanced strength and material density
  • CNC-machined intake and exhaust ports
  • CNC-machined combustion chambers
  • Includes valve seats and valve guides installed
  • Valve seats and guides designed to accommodate 2.20" (intake) and 1.6". (exhaust) valves
  • Assembled head includes 2.20" intake and 1.61" valves and beehive-type valve springs (including retainers and keepers) installed

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Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance parts that are emissions-related may not meet U.S., Canadian, and state and provincial laws and regulations relating to motor-vehicle emissions. These parts are designed and intended for use in vehicles operated exclusively for competition: in racing or organized competition on courses separate from public streets or highways. Visit www.chevroletperformance.com/emissions for more details.

  • CHEVROLET PERFORMANCE PARTS COMPLIANCE WITH EMISSIONS STANDARDS

    Motor vehicle emissions standards are intended to help achieve and maintain air quality goals that benefit human health and the environment. U.S. federal and state and Canadian law prohibits knowingly removing, modifying, or making inoperative, or causing someone to remove or render inoperative, or otherwise tampering with, any part or element of design installed in compliance with motor vehicle emission standards on a motor vehicle or nonroad vehicle, or otherwise modifying any required emission and noise control system. Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance Parts may not meet emissions laws and regulations and should not be operated on public roads or used for any other use. This part is intended primarily for use in vehicles that are NOT:

    (1) “motor vehicles” designed for street use; or

    (2) off-road vehicles used for anything but competition.

    U.S. federal and state, and Canadian provincial agencies have the authority to administer substantial monetary penalties against individuals and companies who do not comply with these laws. Chevrolet Performance customers are responsible for ensuring their use of Chevrolet Performance Parts complies with applicable federal, state/provincial and local laws, regulations and ordinances, and for ensuring that modified vehicles are operated in a manner that complies with applicable laws. In an effort to help consumers maintain compliance with emissions regulations, the product descriptions for many parts include emissions-related warnings and notices. This page summarizes the emissions-related information that you may see on this website.

    PARTS INTENDED FOR COMPETITION USE ONLY

    Chevrolet Performance offers parts that are intended exclusively for use in competition vehicles that will only be driven on a track or off-road course. By “competition vehicles,” GM means vehicles (i) used exclusively for competitions organized and sanctioned by a local or private body and (ii) not designed for use on public streets or highways. Consumers are strongly advised not to install parts accompanied by this warning on vehicles that will be driven on public roads, as they are not designed for that purpose. The product descriptions for such parts are accompanied by the “Checkered Flag” warning icon.

    WARNING: NOT EMISSIONS LEGAL FOR STREET USE

    Because of their effect on a vehicle’s emissions performance, certain parts are intended exclusively for use in competition vehicles. The “Checkered Flag” warning icon means a part is designed and intended for use in vehicles operated exclusively for competition: in racing or organized competition on courses separate from public streets or highways. Installation or use of this part on a vehicle operated on public streets or highways is likely to violate U.S., Canadian, and state and provincial laws and regulations relating to motor vehicle emissions.