SB Chevy Aluminum Cylinder Head 205cc 68cc Hydraulic Flat Tappet SBC Steam Holes For Sale - New and Used

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SB Chevy Aluminum Cylinder Head 205cc 68cc Hydraulic Flat Tappet SBC Steam Holes:
$592.46

SB Chevy Aluminum Cylinder Head - AssembledWith Steam Holes for 400 & 406 EnginesFor use with Hydraulic Flat Tappet Cam
Crafted from high-grade aluminum, bronze valve guides, hardened seats, and advanced port design for improved airflow.
This head features a thicker deck design so they can be used on nitrous, turbocharged and supercharged applications.
Dual valve cover bolt pattern, will accept either center bolt or perimeter bolt valve covers.Professionally assembled here in the USA, using premium parts and hardware sourced from domestic suppliers. Vacuum and pressure tested to ensure durability and performance.
Specs & Information:

Material:A356 Aluminum Alloy

Finish:Natural / Machined

Valve Springs Type: Hydraulic Flat Tappet (.535 Max Lift)

Spark Plug Style:Straight

Intake Valve Diameter:2.020”

Intake Runner Volume:205cc

Exhaust Valve Diameter:1.600”

Exhaust Port Volume:79cc

Combustion ChamberVolume:68cc

Intake Port Dims: 2.200” x 1.200” (Square)

Exhaust Port Dims:1.356” x 1.420” (Square)

Intake Port Location: Stock

Exhaust Port Location: Stock

Valve Cover Bolt Pattern:Dual Pattern (Perimeter & Center Bolt)

Accessory Bolt Holes:Yes

Deck Thickness: .450”

Intake Valve Angle:23 deg.

Exhaust Valve Angle:23 deg.

Valve Seats Machined:Yes

Valve Seat Machine Style:3-Angle

Valve Seat Material:Hardened Ductile Iron

Valve Spring Pocked Diameter: 1.580” OD (1.600” OD Max Machining)

ValveLength:5.015" (+.100" longer)

ValveStem Diameter:.3415" - 11/32"

Valve Guide Material:Intake = Manganese Bronze & Exhaust = Phosphor Bronze

ValveGuides:1/2" OD

ValveGuide length: 1.950"

ValveGuide clearance: .0014"- .002" (with .3415 Dia valve stem)

Rocker Studs: 3/8"

Guide Plates: 5/16" Adjustable

SparkPlug Dimensions: 14mmx .750” with Gasket Seat (Autolite 3923 or NGK 4554)

Steam Holes Drilled:YES

BlockUse Type: Iron or Aluminum

Important Notes:

This listing is for One Cylinder Head product is legal for off road use and non pollution controlled vehicles only; however, it has not been tested or approved by the California Air Resources Board (CARB) for highway vehicles in the state of California. By purchasing this product, buyer agrees it will not be used on pollution controlled vehicles in California, or in a state with similar emissions Us

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