Chevrolet LS3 L76 L92 LS2 255cc 64cc Assembled Aluminum Cylinder Head Pro Header For Sale

Hello This sale is for a new pair,(2) Pro headerLS cylinder headsfor LS3 LS6 LS7 L76 L72 L92 LS2CHEVROLET ENGINES.Heads have huge rectangle
255ccintake runners and 64cc combustion chambers. These Heads are much better than stock GM heads, youwill get easily 75-80hp gains or more!! These new heads castings WE CNC Machine and assemble, that iswhy and how wehave no issues!!, bolt on performance and reliability!.Heads are Brand new and all components are brand new parts with no corners cut! We sell a lot of heads making small dollarswith a lot of sales to make big dollars we want a lot of users happy!!.Please look close at all the pictures you can see we do all CNC Machine workin house!! with expert people who assemble the heads for trouble free service. Heads have all bolts holes for all stock accessory brackets, no special brackets needed, no special intakes or exhaust needed, run Stock stuff or aftermarket parts with no problems and great performance!!. These heads fit all GM blocks,All specs are listed as follows,
Chevy LS3 LS6 LS7 L72 L76 L92 LS2 255cc 64cc Assembled Aluminum Cylinder Heads
Part Type:Cylinder HeadsCylinder Head Style:AssembledCylinder Head Material:AluminumCylinder Head Finish:NaturalCombustion Chamber Volume (cc):64 ccCNC-Machined Combustion Chamber:NoIntake Runner Volume (cc):
255 cc
CNC-Machined Intake Runner:NoCNC-Machined Exhaust Runner:NoIntake Port Shape:RectangleIntake Port Location:StandardExhaust Port Shape:OvalExhaust Port Location:StandardComp. Valve Job:Seat Pressures:Seat Pressure W/O Inner Spring:YesClosed 145Closed 115Intake Valves Included:YesIntake Valve Diameter (in):2.165 in.Exhaust Valves Included:YesExhaust Valve Diameter (in):1.600 in.Valve Springs Included:Yes (Double Springs up to .680 lift)Retainers Included:YesLocks Included:YesValve Stem Seals Included:YesRocker Arm Studs Included:NoRocker Arms Included:NoRocker Arm Nuts Included:NoGuideplates Included:NoValve Cover Mounting Style:Perimeter BoltAccessory Bolt Holes Drilled:YesIntake Valve Angle:45 deg.Exhaust Valve Angle:45 deg.Valve Guides Included:YesValve Guide Material:BronzeValve Seats Machined:YesValve Seat Machine Style:3-angleValve Seat Material:Ductile ironOiling Style:Through pushrodMachined for O-Ring:NoHeat Crossover:NoQuantity:Sold in Sets of TwoParts Used in Assembly as follows:

• 1.600\" one piece swirl polished stainless steel severe duty exhaust valves (Qualcast)
• 2.165\" one piece swirl polished stainless steel severe duty intake valves (Qualcast)
• 1.320\" OD X 2.235 True Double Springs (Qualcast)
• New Hardened 1.300 Retainers 7°
• New Hardened 312 Valve Locks
• New 312 Positive Control Seals
• New .015\" Valve Shim
• Springs,
  Engine: LS3/L72/L92 LS7
  Number Of Coils: Dual Spring

  MANUFACTURE FLOW # @28 in

  Lift Intake Exhaust

  .100 71.5 59.1

  .200 158.7 123.2

  .300 229.8 174.1

  .400 290.6 218.4

  .500 327.3 240.4

  .600 359.5 252.5

  .700 377.4 260.6

  OVER 900HP POTENTIAL with THESE HEADS
  Damper Spring: No
  Overall Diameter: 1.320\" OD
  Inside Diameter: .676\" ID
  Spring Height: 1.800\"
  Seat Pressure: 145 lbs @ 1.800\"
  Open Pressure: 385 lbs. @ 1.150\"
  Coil Bind: 1.100\"
  Spring Rate (lbs./in.): 375 lbs/in
  Max Lift: .680\"

These heads are assembled and have 145 pounds closed seat pressure. If that is too much you can remove the inner spring and that will put you at 115 Pounds closed seat pressure which is more for a stock replacement. No beehive springs here!!We do the CNC maching and assembly. These heads are comparable to Dart world AFR speedmaster pro comp Edelbrock GM. Thanks for looking
Please feel free to ask any and all questions directly thru messaging system, I will answer all questions, I want you happy!!. I cant include personal contact information its against policy,After purchase on we can exchange contact information as needed.